Welcome to Simple Calculators
A collection of fast, lightweight calculators to help you with everyday calculations.
Mortgage Calculator
Calculate monthly payments, total interest, and amortization summary.
Budget Calculator
Plan your monthly budget with income and expense tracking.
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Interest Calculator
Calculate simple interest on your principal amount.
Compound Interest Calculator
Watch your money grow with compound interest over time.
Auto Loan Calculator
Calculate car payment and total interest costs.
Credit Card Payoff
Find how long to pay off credit card debt.
Debt Payoff Calculator
Estimate payoff timeline and total interest for your debt.
Retirement Calculator
Plan your retirement and check if you're on track.
Investment Growth
Project your investment growth with regular contributions.
Refinance Calculator
Calculate savings from refinancing your loan.
Down Payment Calculator
Calculate down payment and monthly payment estimates.
Weather Converter
Convert temperatures between Celsius and Fahrenheit instantly.
Calorie Calculator
Calculate BMR and daily calorie targets based on your goals.
Bike Gear Calculator
Compute gear inches and speed estimates for your bike setup.
Net Worth Calculator
Track your assets and liabilities to calculate your net worth.
Quick Converters
Jump straight to unit converters for common everyday tasks.
Temperature Converter
Convert Celsius and Fahrenheit instantly.
Weight Converter
Convert pounds and kilograms.
Length Converter
Convert inches, centimeters, feet, and meters.
Speed Converter
Convert mph and km/h.
Volume Converter
Convert gallons and liters.
Area Converter
Convert square feet and square meters.
Time Converter
Convert hours and minutes.
File Size Converter
Convert KB, MB, and GB.
Percentage Converter
Convert percent and decimal values.
Date Difference
Calculate the difference between dates.