Calculators & Converters20 live toolsFree onlineNo sign-up

Calculators & Converters Tools

Everyday calculators for finance, health, dates, units, fuel, electricity, and quick conversions.

Percentage Calculator

Solve common percentage calculations instantly , what is X% of Y, percentage change, and reverse percent.

Estimate GPA from course grades and credit hours , supports 4.0 and weighted grading systems.

Calculate exact age from a birth date with years, months, and days , find how many days until your birthday.

Measure the exact duration between two dates and times , calculate days, weeks, months, and hours between dates.

Estimate monthly EMI payments, total interest cost, and full repayment schedule for any loan.

Calculate body mass index from weight and height , includes BMI category classification and health guidance.

Convert between common units for length, weight, speed, and temperature , instant multi-unit calculator.

Convert currencies with live exchange rates plus offline fallback , support for 150+ world currencies.

Convert a date and time across major world time zones , plan meetings across countries instantly.

Convert numbers to Roman numerals and vice versa , supports I to MMMCMXCIX with instant conversion.

Calculate tip amount, total bill, and per-person split in one step , the easiest restaurant tip calculator.

Work out discount savings and final price after percentage reductions , calculate sale prices instantly.

Measure percentage increase or decrease between two values , essential for financial and analytics reporting.

Calculate selling price and profit from cost and markup percentage , retail pricing made simple.

Estimate gross margin percentage and net profit from selling price and cost , essential for pricing decisions.

Estimate fuel needed and trip cost from distance, efficiency, and fuel price , plan road trips easily.

Estimate monthly electricity cost from wattage, daily runtime, and energy price , reduce your power bill.

Calculate running pace per kilometer and average speed from distance and total time , runner's must-have tool.

Estimate future value and earned interest with annual compound growth , investment and savings planning tool.

Calculate speed, distance, or time from any two known values , physics and travel planning formula tool.

249+ browser-based tools across 16 categories , all free, no sign-up required.