Best Free Calculators in 2026

Compare and use the top free calculators on Yoopla. This hub brings together 12 hand-picked tools that run directly in your browser, so your data stays private and you can start instantly with no installation or account.

12 free tools curated for this category.

Electricity Cost Calculator

Calculate the electricity cost of running appliances based on wattage, usage hours, and your electricity rate.

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Aspect Ratio Calculator

Calculate and convert aspect ratios for images, videos, and screens. Find dimensions for any target ratio.

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VAT Calculator

Calculate VAT in seconds — add VAT to a net price or remove VAT from a gross price. Supports all VAT rates from 5% to 27%. Free, instant, no registration required.

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Loan Calculator

Calculate monthly loan payments, total interest cost, and view a full amortization schedule. Works for mortgages, auto loans, personal loans, and any fixed-rate loan. Enter principal, interest rate, and term — see exactly how much each payment goes to interest vs principal.

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BMI Calculator

Calculate your Body Mass Index (BMI) instantly using metric or imperial units. Based on WHO guidelines, the result shows your weight category — underweight, healthy weight, overweight, or obese — along with what a healthy weight range looks like for your height.

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Unit Converter

Convert instantly between units of length, weight, volume, area, speed, and temperature. Covers both metric (SI) and imperial/US customary units. Enter any value and see all equivalent units at once — no page reloads, no ads.

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Time Calculator

Calculate time differences, add or subtract time periods easily with our free online time calculator. Work with hours, minutes, and seconds seamlessly.

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Interest Calculator

Calculate simple and compound interest for any principal, rate, and time period. Compare earnings across different compounding frequencies — annual, monthly, daily. See how your savings or investment grows over time with the power of compound interest.

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Random Number Generator

Generate truly random numbers instantly with our secure, client-side random number generator. Perfect for sweepstakes, giveaways, and statistics. Set custom ranges, generate multiple numbers, and get instant, completely fair results without registration.

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GPA Calculator

Calculate your Grade Point Average (GPA) for college, high school, or university. Supports 4.0 and 5.0 scales with detailed course breakdown.

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Hours Calculator

Calculate total hours worked with break time deductions, overnight shifts, and optional pay calculation. Add multiple work entries for different days. Perfect for freelancers, hourly employees, and payroll tracking.

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Retirement Calculator

Calculate how much you need to retire, how your savings grow until retirement, and what monthly income your nest egg will support. Uses compound interest projections and the 4% safe withdrawal rule. Enter your age, savings, contributions, and target retirement age.

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