🧮 Calculators

Calculate your monthly mortgage payment, total interest paid, and full amortization schedule — enter your loan amount, interest rate, term, and down payment for instant results.

Convert between 160+ world currencies using live exchange rates. Select source and target currencies, enter an amount, and get the converted value instantly — swap currencies with one click.

Calculate monthly loan payments, total interest, and the full repayment schedule for any personal or auto loan — enter loan amount, rate, and term 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, or monthly pay to annual salary instantly. Calculate take-home pay and compare compensation packages — free online.

Calculate exact age in years, months, and days from any birthdate. Find days until next birthday and age between two dates — free, instant results.

Estimate retirement savings and monthly income from your portfolio. Enter current savings, contributions, and retirement age for a complete projection — free.

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 with step-by-step solutions. Converts to mixed numbers and decimals automatically — free online calculator.

Calculate sales tax and final price for any US state or custom rate. Instantly see tax amount and total price — free, no sign-up required.

Calculate total return, annualised ROI, and profit from any investment. Enter cost, sale price, and holding period to see complete return metrics — free.

Convert numbers to Roman numerals and Roman numerals to numbers instantly. Supports 1–3,999 with step-by-step breakdown — free online converter.

Calculate sale price after a discount percentage instantly. Find original price from discount and final price, or calculate the discount percentage — free.

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

Convert numbers between binary, octal, decimal, and hexadecimal instantly. Enter any value in any base and see all conversions simultaneously — free.

Calculate area of any shape: rectangle, circle, triangle, trapezoid, and more. Supports metric and imperial units with instant conversion — free online tool.

Calculate the inflation-adjusted value of money over any year range using CPI data. See purchasing power changes from 1913 to present — free online.

Calculate speed, distance, or time from any two values. Convert between mph, km/h, m/s, and knots instantly. Free online speed distance time calculator.

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

Calculate volume of any 3D shape: cube, sphere, cylinder, cone, pyramid, and more. Supports metric and imperial units with instant conversion — free.

Calculate trip fuel cost based on distance, fuel efficiency, and gas price. Compare petrol vs diesel vs EV costs per mile — 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 from cost and desired markup percentage, or find the markup from cost and price. Essential for retail pricing — 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 trillion — free online converter.