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Free Online Calculators

90+ free calculators for finance, health, and everyday conversions. No sign-up required. Instant results.

Core Financial

13 tools

Compound Interest Calculator

See how your investments grow with compound interest

Investment Return Calculator

Calculate returns with lump sum and monthly contributions

Simple Interest Calculator

Calculate simple interest on loans and deposits

Future Value Calculator

Project the future value of any investment

Savings Calculator

Model your savings growth with compound interest

Savings Goal Calculator

Find out how long to reach any savings target

How Long to Save Calculator

Calculate months to reach a savings goal

Net Worth Calculator

Calculate your total assets minus liabilities

Convert APR to APY and compare savings rates

Inflation Calculator

See the real purchasing power of money over time

Percentage Calculator

Calculate percentages, increases, and decreases

Discount Calculator

Find sale price and savings from any percentage or fixed discount

Add or remove VAT from any price at any rate

Loans & Debt

11 tools

Mortgage Calculator

Monthly payment, total interest, and amortization

Amortization Calculator

Full amortization schedule for any loan

Loan Calculator

Personal loan payment and total cost calculator

Auto Loan Calculator

Car loan monthly payment and interest calculator

Loan Payoff Calculator

Find out when your loan will be paid off

Loan Extra Payments Calculator

See how extra payments shorten your loan

Mortgage Refinance Calculator

Calculate break-even on a mortgage refinance

Credit Card Payoff Calculator

Payoff timeline and total interest for credit card debt

HELOC Calculator

Home equity line of credit payment calculator

Interest Rate Calculator

Solve for the interest rate on any loan or investment

Debt-to-income ratio for mortgage qualification

Retirement & FIRE

8 tools

Retirement Calculator

Project your retirement balance and income

FIRE Calculator

Calculate your FIRE number and years to financial independence

Coast FIRE Calculator

Find your Coast FI number — when you can stop contributing

Dollar-cost averaging investment growth calculator

Systematic Investment Plan return calculator

Portfolio Calculator

Model portfolio growth across multiple assets

ETF investment growth and fee impact calculator

Money Longevity Calculator

How long will your retirement savings last?

Investing

9 tools

CAGR Calculator

Compound annual growth rate calculator

Return on investment percentage calculator

Internal rate of return for cash flow series

Dividend Calculator

Dividend income and growth calculator

Dividend Yield Calculator

Calculate dividend yield from price and payout

Stock Average Calculator

Average down or up your cost basis

Margin Calculator

Profit margin and markup calculator

Annual percentage yield calculator

Currency Converter

Live exchange rates for 30+ currencies

Income & Budget

6 tools

Salary Calculator

Convert salary between hourly, weekly, monthly, annual

Pay Raise Calculator

Calculate new salary after a raise or promotion

Overtime Calculator

Overtime pay and total earnings calculator

Split bills and calculate tips easily

Cash Back Calculator

Compare cash back rewards across credit cards

Sales Tax Calculator

Add or remove sales tax from any price at any rate

Real Estate

5 tools

Rental Property Calculator

Cash flow, cap rate, and ROI for rental properties

Cap Rate Calculator

Capitalization rate for investment properties

House Flip Calculator

Profit and ROI calculator for house flipping

Price Per Square Foot Calculator

Compare property prices per sq ft

Money market account return calculator

Health & Lifestyle

8 tools

Body Mass Index — metric and imperial

TDEE Calculator

Total Daily Energy Expenditure and calorie needs

Calorie Deficit Calculator

Daily calorie target for weight loss, maintenance, or gain

Running Pace Calculator

Convert pace, speed, distance, and finish time

Grade Calculator

Weighted average course grade and letter grade

Calculate exact age in years, months, and days

Date Calculator

Days between dates and date arithmetic

Calculate grade point average from letter grades and credit hours

Home & DIY

10 tools

Square Footage Calculator

Area for rooms in any shape

Paint Calculator

Gallons of paint needed for any room

Flooring Calculator

Flooring material needed with waste factor

Cubic Yards Calculator

Mulch, gravel, concrete, and topsoil volume

Cubic Feet Calculator

Volume in cubic feet for any shape

Gravel Calculator

Gravel and crushed stone weight and volume

Mulch Calculator

Cubic yards of mulch for garden beds

Asphalt Calculator

Asphalt tonnage for driveways and paths

LED Savings Calculator

Energy and cost savings from switching to LED

Electricity Cost Calculator

Annual electricity cost by appliance

Unit Converters

15 tools

Length Converter

mm, cm, m, km, inches, feet, yards, miles

Weight Converter

kg, g, lbs, oz, stone, metric tons

Temperature Converter

Celsius, Fahrenheit, Kelvin, Rankine

m², ft², acres, hectares and more

Volume Converter

Liters, gallons, cups, fl oz and more

Speed Converter

mph, km/h, m/s, knots and more

Seconds, minutes, hours, days, years

Bytes, KB, MB, GB, TB — decimal and binary

Currency Converter

Live rates for 30+ world currencies

Centimeters to feet and inches

Kilograms to lbs — quick and accurate

Lbs to kilograms converter

Kilometers to miles — running & driving

Miles to kilometers converter

Inches to centimeters — clothing & screens

Automotive & Energy

5 tools

MPGe Calculator

Miles per gallon equivalent for EVs

Miles Per kWh Calculator

EV efficiency and energy cost calculator

Cubic metre shipping volume calculator

Fuel Cost Calculator

Estimate road trip fuel cost by distance, MPG, and gas price

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal

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