🧮 Calculators

Calculate your monthly mortgage payment and total interest paid — enter your loan amount, interest rate, term, and down payment for instant results in over 40 world currencies.

Convert between 39 major world currencies using live exchange rates from the European Central Bank, with automatic fallback sources if the primary feed is unavailable. Enter an amount, pick your currencies, and get the converted value instantly — swap with one click.

Calculate monthly loan payments and total interest for any personal or auto loan — enter loan amount, rate, and term in months for instant results you can download.

Convert between units of length, weight, temperature, volume, speed, area, and data — select a category, enter a value, choose units, and get the converted result instantly.

Calculate percentages instantly — find what % of a number is, percentage change, and reverse percent problems. Free, no sign-up required.

Full-featured scientific calculator with trig functions, logarithms, exponents, and parentheses. Runs in the browser — no download needed.

Calculate compound interest growth over time. Enter principal, rate, frequency, and years to see final balance and total interest earned — free.

Convert hourly, daily, weekly, monthly, or annual pay to all other pay periods instantly — free online. Assumes a standard 8-hour day, 5-day week, 52-week year.

Calculate exact age in years, months, and days from any birthdate, plus your total age in days, hours, and minutes — free, instant results for any past or future date.

Estimate how your retirement savings will grow based on your current balance, monthly contributions, and expected investment return — free, instant projection.

Calculate tip amount and total bill per person instantly. Enter bill, tip percentage, and number of diners to split the check evenly — free online tool.

Add, subtract, multiply, and divide fractions instantly. Get the simplified result and its decimal equivalent — free online calculator.

Calculate sales tax and the final price for any item — enter the price and tax rate to instantly see the tax amount and total. Free, no sign-up required.

Project the future value of an investment using a compounding annual return rate. Enter initial amount, expected annual return, and years to see final value, total return, and ROI — free.

Convert numbers to Roman numerals and Roman numerals back to numbers instantly. Supports 1–3,999 — free online converter.

Calculate the discount amount and final sale price from an original price and discount percentage — free instant discount calculator.

Convert hourly wage to annual salary and see weekly, monthly, and daily pay. Instantly calculate your total compensation — free online tool.

Convert a number between binary, octal, decimal, and hexadecimal instantly. Enter a value, pick its source base, and see all four conversions at once — free.

Calculate the area of a rectangle, circle, triangle, or trapezoid instantly. Enter the required dimensions and get the area in square units — free online tool.

Estimate the inflation-adjusted value of money using a compounding annual inflation rate you specify. Enter an amount, a rate, and a year range to see the equivalent value — free online.

Calculate speed, distance, or time from the other two values. Enter distance in km and time in hours to instantly find the missing value — free online speed distance time calculator.

Calculate gross profit, profit margin percentage, and markup percentage instantly. Enter revenue and cost to see all three profitability metrics — free online tool.

Calculate the volume of a cube, sphere, cylinder, or cone instantly. Enter the required dimensions and get the volume in cubic units — free online tool.

Calculate trip fuel cost based on distance, fuel efficiency, and fuel price. Works in metric (km, L/100km) or imperial (miles, MPG) units — free online tool.

Calculate break-even point in units and revenue for any business or product. Enter fixed costs, variable costs, and selling price — free online analysis.

Calculate selling price and profit amount from cost and a markup percentage. Enter your cost and desired markup to see the price instantly — free online.

Calculate electricity cost for any appliance based on wattage, hours of use, and rate per kWh. Find monthly and annual energy costs — free online tool.

Convert numbers to written words in English — 1,234 becomes "one thousand two hundred thirty-four." Supports up to 999 billion — free online converter.