Free Online Calculators
AP exam scores and GPA calculators
Education
AP Calculus AB Score Calculator
Estimate your AP Calc AB score from MCQ and FRQ
AP Calculus BC Score Calculator
Estimate your AP Calc BC score from MCQ and FRQ
AP English Language Score Calculator
Estimate your AP Lang score from MCQ and essays
AP English Literature Score Calculator
Estimate your AP Lit score from MCQ and essays
AP Biology Score Calculator
Estimate your AP Bio score from MCQ and FRQ
AP Chemistry Score Calculator
Estimate your AP Chem score from MCQ and FRQ
AP Statistics Score Calculator
Estimate your AP Stats score from MCQ and FRQ
AP US Government Score Calculator
Estimate your AP Gov score from MCQ and FRQ
AP Psychology Score Calculator
Estimate your AP Psych score from MCQ and FRQ
APUSH Score Calculator
Estimate your AP US History score from MCQ, SAQ, DBQ, LEQ
AP World History Score Calculator
Estimate your AP World score from MCQ, SAQ, DBQ, LEQ
APES Score Calculator
Estimate your AP Environmental Science score
AP Computer Science A Score Calculator
Estimate your AP CSA score from MCQ and FRQ
GPA Calculator
Weighted and unweighted high school GPA
Middle School GPA Calculator
Simple unweighted GPA for middle schoolers
College GPA Calculator
Cumulative college GPA with prior credits
Semester Grade Calculator
Class grade from weighted categories
Cumulative GPA Calculator
Multi-semester GPA rollup
LSAT Score Calculator
Raw score to estimated scaled score (120-180)
LSAC GPA Calculator
Recalculate your GPA the way LSAC does for law school
Binary to Decimal Converter
Convert between binary, decimal, hexadecimal, and octal
Average Calculator
Calculate the mean, median, mode, and range of a set of numbers
Percentage Calculator
Calculate percentages three different ways
Unit Converter
Convert length, weight, volume, and temperature units
Fraction Calculator
Add, subtract, multiply, or divide fractions
Weighted Average Calculator
Find the weighted mean of a set of values and weights
Odds Calculator
Convert ratio, decimal, fractional & American odds to probability
Expected Value Calculator
Find E[X], variance & standard deviation of outcomes
Combination and Permutation Calculator
Calculate nCr and nPr from n and r
Punnett Square Calculator
Cross two genotypes and find offspring ratios
Percent Change Calculator
Calculate percentage increase or decrease between two values
Correlation Calculator
Calculate the Pearson correlation coefficient (r) between two data sets
A/B Test Significance Calculator
Find out whether your A/B test result is statistically significant
Discount Calculator
Calculate sale price, amount saved, or discount percentage
DNA Molarity Calculator
Convert DNA/oligo concentration from ng/µL to nM
Black-Scholes Calculator
Calculate the theoretical price of a European call or put option
Sample Size Calculator
Calculate the survey sample size you need
Finance
Paycheck Calculator
Take-home pay after federal, FICA, and state taxes
Reverse Sales Tax Calculator
Find the pre-tax price from a tax-included total
Social Security Wages Calculator
Calculate your W-2 Box 3 and Box 5 wages from gross pay
Pro Rata Calculator
Calculate a prorated amount for a partial period
Bonus Paycheck Calculator
Estimate your take-home pay on a bonus check
Nanny Tax Calculator
Calculate household employer payroll taxes for a nanny or caregiver
DSO Calculator
Calculate your average collection period from AR and credit sales
Cost Per Lead Calculator
Calculate your cost per lead and customer acquisition cost
Commission Calculator
Calculate flat-rate or tiered sales commission
Powerball Payout Calculator
Compare lump-sum vs. annuity payouts after taxes
Student Loan Consolidation Calculator
Calculate your new weighted-average rate and monthly payment
Student Loan Refinance Calculator
Compare your current loan against a refinance offer
CD Penalty Calculator
Estimate the penalty for cashing out a CD before maturity
CBM Calculator
Calculate shipment volume and chargeable weight for freight
Total Revenue Calculator
Calculate gross and net revenue from units sold and price
Employee Burden Rate Calculator
Calculate the true fully-burdened cost of an employee
Time to Decimal Calculator
Convert hours and minutes to decimal hours for payroll
Lease Mileage Calculator
Project your ending mileage and estimate any overage fee
Debt Consolidation Loan Calculator
Compare your current debts against a new consolidation loan
Raise Calculator
Calculate your new salary or your raise percentage
Timecard Calculator
Calculate weekly hours, overtime, and pay from daily clock times
Car Insurance Calculator
Estimate your average car insurance cost by state, age, and driving record
APY Calculator
Convert an interest rate and compounding frequency into Annual Percentage Yield
CD Laddering Calculator
Split your investment across multiple CD terms and see your blended return
Pallet Volume Calculator
Calculate pallet volume in cubic feet and CBM, and boxes per pallet
Home Equity Loan Calculator
Estimate your available equity and monthly payment
Balloon Payment Calculator
Calculate your monthly payment and balloon amount due
Bond Yield Calculator
Calculate yield to maturity, current yield, and yield to call
Cap Rate Calculator
Calculate capitalization rate, or solve for value or required NOI
Churn Rate Calculator
Calculate customer or revenue churn, retention, and its cost
Contribution Margin Calculator
Calculate contribution margin, ratio, and break-even units
CPM Calculator
Calculate cost per 1,000 impressions, ad spend, or impressions
Credit Utilization Calculator
Calculate your credit utilization ratio and how much to pay down
EBITDA Calculator
Calculate EBITDA, adjusted EBITDA, and EBITDA margin
SaaS Metrics Calculator
Calculate MRR, ARR, LTV, CAC, and your LTV:CAC ratio
Break-Even Calculator
Calculate break-even units, revenue, and margin of safety
Burn Rate Calculator
Calculate net burn, gross burn, and cash runway
CAGR Calculator
Calculate compound annual growth rate, final value, or time needed
Annuity Calculator
Calculate annuity growth or a retirement payout schedule
Compound Interest Calculator
See how your investment grows with compound interest
RMD Calculator
Find your Required Minimum Distribution using the IRS Uniform Lifetime Table
Car Affordability Calculator
Find the car price you can afford
Property Tax Calculator
Estimate your annual and monthly property tax
Title Insurance Calculator
Estimate owner's and lender's title insurance policy cost
Debt Trap Calculator
Check your debt-to-income ratio and financial risk
Financial Freedom Calculator
Calculate your FIRE number and years to financial independence
Savings Goal Calculator
Find the monthly savings needed to reach your goal
Customer Lifetime Value Calculator
Calculate CLV from revenue, margin, frequency, and lifetime
CTR Calculator
Calculate click-through rate, CPC, and cost per conversion
Engagement Rate Calculator
Calculate your social media engagement rate
Inflation Calculator
Calculate purchasing power change using real US CPI data
Child Cost Calculator
Estimate the total cost of raising a child through age 18
Pet Cost Calculator
Estimate the monthly, yearly, and lifetime cost of a pet
Wedding Cost Calculator
Estimate your total wedding budget
PTO Calculator
Find out how many PTO days a trip actually uses
Cost of Living Calculator
Estimate a realistic monthly budget by city and household
Website Cost Calculator
Estimate what your website will cost to build
Home Value Estimator
Estimate your home's value from comparable sales
Rental Income Calculator
Net rental income, cap rate & cash flow
FUTA Tax Calculator
Calculate your Federal Unemployment Tax Act liability per employee
Home Insurance Calculator
Estimate your annual homeowners insurance premium by state
Retained Earnings Calculator
Calculate ending retained earnings from net income and dividends
TRIR Calculator
Calculate your Total Recordable Incident Rate (OSHA formula)
Origination Fee Calculator
Calculate loan origination fee and net proceeds
Retroactive Pay Calculator
Calculate retro pay owed after a delayed raise or correction
PTO Accrual Calculator
Calculate your PTO accrual rate and current balance
Monthly Interest Rate Calculator
Convert an annual interest rate to monthly
Erlang C Calculator
Calculate call center agents needed to hit your service level
PTO Payout Calculator
Calculate the cash value of unused PTO hours
Blended Rate Calculator
Weighted-average interest rate across multiple loans
Term Life Insurance Calculator
Calculate how much life insurance coverage you need
PayPal Fee Calculator
Calculate PayPal fees and your net payout
Present Value of Lease Payments Calculator
Calculate ASC 842 lease liability
Timely Filing Calculator
Calculate your insurance claim filing deadline
Moving Cost Calculator
Estimate local or long-distance moving costs
IBR Calculator
Estimate your Income-Based Repayment student loan payment
Gross-Up Calculator
Find the gross amount needed to net a target take-home payment
ROAS Calculator
Calculate return on ad spend and your break-even ROAS
Share of Voice Calculator
Calculate your brand's share of voice against the total market
PSLF Calculator
Track your progress toward Public Service Loan Forgiveness
Freight Class Calculator
Estimate your shipment's NMFC freight class from weight and dimensions
Social Security Taxable Benefits Calculator
Find out how much of your Social Security benefits is federally taxable
Student Loan Interest Calculator
Calculate daily and monthly interest accrual on your student loan
eBay Fee Calculator
Calculate eBay's final value fee and your net payout
R&D Tax Credit Calculator
Estimate your federal R&D tax credit using the ASC method
MACRS Depreciation Calculator
Calculate your IRS MACRS depreciation schedule
Straight-Line Amortization Calculator
Calculate equal annual depreciation or amortization amounts
Overtime Rate Calculator
Calculate your overtime and double-time pay rates
Zakat Calculator
Calculate your annual Zakat obligation
S Corp Tax Savings Calculator
Compare self-employment tax: sole proprietor vs. S-corp
Crypto Capital Gains Calculator
Calculate short vs. long-term capital gains tax on a crypto trade
Predetermined Overhead Rate Calculator
Calculate your manufacturing overhead rate
Invoice Due Date Calculator
Calculate an invoice due date from Net 30/60/90 terms
Present Value of Cash Flows Calculator
Calculate the net present value (NPV) of a cash flow series
Mortgage Pre-Approval Calculator
Estimate your maximum home price and loan amount
NOL Calculator
Calculate your net operating loss and carryforward deduction
FDIC Insurance Coverage Calculator
Estimate how much of your deposits are FDIC-insured at one bank
Student Loan Payoff Calculator
See how extra payments speed up your payoff and cut your interest
FTE Calculator
Calculate full-time equivalent (FTE) employees
SBA Guaranty Fee Calculator
Estimate the upfront guaranty fee on an SBA 7(a) loan
Delaware Franchise Tax Calculator
Calculate your Delaware corporation's franchise tax — both methods compared
Accumulated Depreciation Calculator
Calculate accumulated depreciation and current book value
Home Office Deduction Calculator
Compare the simplified method against the actual expense method
VA Loan Calculator
Calculate your VA funding fee and estimated monthly payment
VA IRRRL Calculator
Streamline refinance savings, funding fee, and break-even point
Loan Overpayment Calculator
See how extra or lump-sum payments cut your loan's interest and payoff time
Loan Calculator
Monthly payment and full amortization schedule for any fixed-rate loan
Days Cash on Hand Calculator
Calculate how many days your cash reserves would cover operating expenses
Billable Hours Calculator
Calculate your total billable amount and utilization rate
HELOC Calculator
Calculate your draw-period and repayment-period HELOC payments
Credit Card Minimum Payment Calculator
Calculate your interest charge, minimum payment, and true payoff time
Credit Card Balance Transfer Calculator
See how much you'd save moving your balance to a promotional-rate card
QBI Deduction Calculator
Estimate your Section 199A qualified business income deduction
Current Ratio Calculator
Calculate your business's short-term liquidity ratio
C-Corp Tax Calculator
Calculate your federal corporate income tax and double-taxation impact
Cash-Out Refinance Calculator
Estimate your cash-out amount, new loan balance, and new monthly payment
Home Refinance Calculator
Compare your new refinanced payment and break-even point on closing costs
Payback Period Calculator
Calculate how long it takes to recover your investment
Georgia TAVT Calculator
Estimate your Title Ad Valorem Tax when titling a vehicle in Georgia
RAP Student Loan Calculator
Estimate your monthly payment under the Repayment Assistance Plan
Net Debt Calculator
Calculate net debt from total debt and cash
Return on Assets Calculator
Calculate how efficiently a company uses its assets to generate profit
Renters Insurance Calculator
Estimate how much personal property and liability coverage you need
Employee Turnover Calculator
Calculate your employee turnover rate
No Tax on Tips & Overtime Calculator
Estimate your qualified tips and overtime deductions
DPMO Calculator
Calculate defects per million opportunities for Six Sigma quality analysis
IFTA Fuel Tax Calculator
Calculate fleet MPG and net taxable gallons for IFTA reporting
Construction
Rafter Length Calculator
Roof rafter length, angle, and rise from span and pitch
Bend Deduction Calculator
Bend allowance, bend deduction, and flat pattern length for sheet metal
Concrete Block Calculator
Estimate blocks and mortar bags for a wall
Siding Calculator
Estimate siding squares needed for your walls
Linear Foot Calculator
Convert square footage to linear feet by material width
Flooring Calculator
Square footage, boxes, and cost for your flooring project
Gravel Calculator
Cubic yards, tons, and cost for gravel, pea gravel, sand, or topsoil
Fence Cost Calculator
Estimate total fence replacement or installation cost
Deck Material Calculator
Estimate decking boards and material cost for your deck
Window Replacement Calculator
Estimate total cost to replace your windows
Roofing Calculator
Estimate roof squares, shingle bundles, and cost
FAR Calculator
Calculate floor area ratio or maximum buildable floor area
Dew Point Calculator
Calculate dew point from temperature and relative humidity
Power Outage Calculator
Size a backup battery or generator for your essential devices
Mulch Calculator
Cubic yards, bags & cost for a garden bed
Plant Spacing Calculator
How many plants fit your bed at a given spacing
Sod Calculator
Rolls, pallets & cost for a new lawn
Soil Calculator
Volume, bags & cost for a raised bed
Fence Material Calculator
Posts, rails, pickets & concrete for a fence
Paint Calculator
Gallons & cans of paint needed for a room
Paver Calculator
Pavers, sand, base & cost for a patio
Plywood Calculator
Sheets & cost to cover a surface
Ramp Calculator
ADA slope, length & landings for a ramp
Asphalt Calculator
Tonnage & truck loads for a driveway
Brick Calculator
Bricks & mortar for a wall
Drywall Calculator
Sheets, mud, tape & screws for a room
French Drain Calculator
Gravel, pipe & fabric for a drainage trench
Lumber Calculator
Board feet & cost for a lumber order
Rebar Calculator
Bars, weight & cost for a slab
Retaining Wall Calculator
Blocks, caps & gravel for a retaining wall
Concrete Foundation Calculator
Slab & footing concrete volume
Concrete Screed Calculator
Cement, sand & gravel for a floor screed
Tile Calculator
Tiles, mortar & grout for a room
Wallpaper Calculator
Rolls of wallpaper needed for a room
Joint Compound Calculator
Drywall mud needed for a wall
Speeds and Feeds Calculator
Calculate CNC spindle RPM and feed rate from cutting speed and chip load
Grout Calculator
Estimate how much grout you need for your tile project
Voltage Drop Calculator
Calculate voltage drop from wire size, current, and distance
Military
Legal
Brewing
Health
Wilks Calculator
Compare powerlifting totals across bodyweights
Body Fat Calculator
Estimate your body fat percentage using the US Navy method
Macro Calculator
Find your daily protein, carb, and fat targets in grams
Heart Rate Zone Calculator
Find your training zones using the Karvonen formula
Ideal Weight Calculator
See your ideal body weight from three clinical formulas
BMI Calculator
Find your Body Mass Index and CDC weight category
Calorie Calculator
Find your daily calorie needs based on your BMR and activity level
Pregnancy Due Date Calculator
Estimate your due date and current week of pregnancy
Ovulation Calculator
Find your estimated ovulation date and fertile window
VO2 Max Calculator
Estimate your VO2 max from a fitness test
Army Body Fat Calculator
Estimate body fat with the Army's 2023 one-site method
Coffee Calculator
Find your safe daily caffeine limit
BAC Calculator
Estimate your blood alcohol content
Body Frame Size Calculator
Find your body frame size from height and wrist
Conception Calculator
Estimate your likely conception date
Daily Water Intake Calculator
Find your personalized daily water intake
Glycemic Load Calculator
Calculate glycemic load from glycemic index and carbs per serving
A1C Calculator & Blood Glucose Unit Converter
Estimate your A1C from average glucose, or convert mg/dL, mmol/L, and A1C
IV Drip Rate Calculator
Calculate IV infusion rate in drops/min or mL/hr
Race Pace Calculator
Calculate your race pace or target finish time
Lifestyle
Cat Age Calculator
Convert your cat's age to human years
Dog Age Calculator
Convert your dog's age to human years, adjusted for size
Clothing Size Converter
Convert clothing and shoe sizes between US, UK, and EU
Cosmetics Expiry Calculator
Find when your makeup or skincare product expires
Unit Price Calculator
Compare cost per unit to find the best value
Countdown Calculator
Find how much time remains until any date
Age Calculator
Find your exact age in years, months, and days
Tip Calculator
Calculate your tip and split the bill between people
Date Calculator
Find days between two dates, or add/subtract time from a date
Time Calculator
Add, subtract, or find the duration between times
Aspect Ratio Calculator
Reduce a ratio or find a missing dimension
Focal Length Calculator
Solve the thin-lens equation for focal length
0-60 Calculator
Estimate your car's 0-60 mph and quarter-mile time
Horsepower Calculator
Calculate horsepower from torque, watts, or quarter-mile
RPM Calculator
Convert RPM, and calculate pulley, gear & wheel speeds
Fuel Cost Calculator
Trip, weekly & annual fuel spend
Fuel Economy Comparison Calculator
Compare the annual fuel cost of two vehicles and find your break-even point
Flight Duration Calculator
Estimate flight time from distance & speed
Travel Insurance Calculator
Estimate travel insurance cost
Travel Budget Calculator
Plan your total trip cost
Poker Odds Calculator
5-card poker hand probabilities and odds
Parlay Payout Calculator
Combined odds and payout for a multi-leg parlay
Arbitrage Betting Calculator
Check for an arbitrage opportunity and split your stake for a guaranteed profit
Round Robin Calculator
Every parlay combination, total stake, and payout for a round robin bet
Blackjack Calculator
Optimal basic strategy: hit, stand, double, or split
Bet Payout Calculator
Calculate payout and profit on a single bet
Roulette Payout Calculator
Calculate roulette bet payouts, win probability, and house edge
Flight Mileage Calculator
Calculate the flight distance between two airports
Business Name Numerology Calculator
Calculate your business name's numerology number
Standard Drink Calculator
Calculate how many US standard drinks are in your beverage
Karmic Debt Number Calculator
Check your birth date for karmic debt numbers 13, 14, 16, and 19
Pool Chlorine Calculator
Find exactly how much liquid chlorine to add to reach your target level
Points vs Cash Calculator
Find your cents-per-point value and whether a redemption is worth it
Package Girth Calculator
Calculate girth and length-plus-girth for shipping
Energy
Solar Panel Calculator
System size, cost & payback for solar
Wind Turbine Calculator
Power output from rotor size & wind speed
Electricity Cost Calculator
What it costs to run any appliance
Appliance Energy Calculator
Total household electricity cost by appliance
Lighting Calculator
How many lights you need for a room
Energy Converter
Convert joules, kWh, BTU, calories & more
Building Energy Efficiency Calculator
Estimate your home's energy efficiency rating
Water Bill Calculator
Estimate your water & sewer bill from usage