calculators-converters

Free calculators and converters: percentage, age, BMI, loan, currency, date, unit converter, GPA, discount, and more. All tools 100% free, no signup required.

Free age calculator. Calculate exact age in years, months, weeks, and days. Find age difference between two dates instantly.

Free BMI calculator. Calculate Body Mass Index and health category. Get personalized recommendations based on WHO standards.

Free compound interest calculator. Calculate investment growth with compound interest. See principal, interest, and total value projections.

Free currency converter. Convert between 150+ world currencies with live exchange rates. Historical data and conversion charts.

Free date difference calculator. Calculate days, weeks, months, and years between two dates. Include or exclude weekends.

Free discount calculator. Calculate final price after discounts and sales tax. Find savings amount and percentage off.

Free electricity cost calculator. Estimate energy costs based on wattage, hours, and rates. Calculate monthly and yearly expenses.

Free fuel cost calculator. Calculate trip costs based on distance, fuel efficiency, and gas prices. Compare fuel savings.

Free GPA calculator. Calculate grade point average with letter grades or percentages. Supports weighted and unweighted GPA.

Free loan calculator. Calculate monthly payments, total interest, and amortization schedules. Compare loan options.

Free margin calculator. Calculate profit margin, markup, and revenue. Convert between margin and markup percentages.

Free markup calculator. Calculate selling price from cost and markup percentage. Find ideal markup for profit targets.

Free pace calculator. Convert running pace between min/km and min/mile. Calculate finish times for races.

Free percentage calculator. Calculate percentages, percentage change, and percentage of totals. Simple percentage math tool.

Free percentage change calculator. Calculate increase or decrease percentages. Find percent difference between values.

Free Roman numeral converter. Convert between Arabic numbers and Roman numerals. Supports numbers up to 3,999,999.

Free speed, distance, time calculator. Calculate missing variable from the other two. Convert between units automatically.

Free time zone converter. Convert times between world time zones. Find meeting times across multiple zones.

Free tip calculator. Calculate tips and split bills among multiple people. Include tax and custom tip percentages.

Free unit converter. Convert length, weight, temperature, volume, area, and more. Support for metric and imperial units.