Free Online Calculators
Fast, accurate, and free calculators for finance, salary, mortgage, loans, taxes, health, and more. No signup required.
- Compound Interest Calculator — Calculate how your investments grow over time with compound interest. See the power of compounding on your savings.
- Mortgage Calculator — Calculate your monthly mortgage payment, total interest, and see how much home you can afford.
- Loan Calculator — Calculate monthly loan payments and total interest for personal loans, auto loans, and more.
- Salary to Hourly Calculator — Convert your annual salary to an hourly rate. Find out how much you earn per hour.
- Hourly to Salary Calculator — Convert your hourly rate to an annual salary. See how much you earn per year.
- ROI Calculator — Calculate return on investment (ROI) to measure the profitability of your investments.
- Retirement Calculator — Plan your retirement savings and see if you're on track to meet your retirement goals.
- Paycheck Calculator — Calculate your take-home pay after taxes and deductions. See your net pay from gross income.
- Tax Calculator — Estimate your income tax and after-tax income. Quick tax calculations for planning.
- BMI Calculator — Calculate your Body Mass Index (BMI) to assess whether your weight is healthy for your height.
- Savings Goal Calculator — Calculate how much you need to save each month to reach your savings goal by a target date.
- Tip Calculator — Calculate tip amounts and split the bill evenly among a group. Perfect for restaurants and dining.
- Currency Converter — Convert between US Dollars, Euros, British Pounds, Brazilian Reais, and other major currencies.
- Inflation Calculator — Calculate the impact of inflation on your money. See how purchasing power changes over time.
- Net Worth Calculator — Calculate your total net worth by subtracting your total liabilities from your total assets.
- Percentage Calculator — Calculate percentages, percentage increase, decrease, and more. Simple percentage calculations.
- Voltage Drop Calculator — Calculate voltage drop across a wire run. Find out if your conductor size is adequate for the load and distance.
- Wire Gauge (AWG) Calculator — Find the correct AWG wire size for a given current load. Based on NEC ampacity tables for copper conductors.
- Breaker Size Calculator — Calculate the correct circuit breaker size for a given load. Follows NEC 210.20 and 240.6 standard breaker sizes.
- Ohm's Law Calculator — Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two values to find the other two.
- Motor Full-Load Current Calculator — Estimate the full-load current (FLA) of a single-phase or three-phase AC motor from its horsepower and voltage rating.
← Back to all calculators