Free Online Calculators — Fast & Accurate
Need a quick answer without opening a spreadsheet? These free calculators handle the everyday math — from BMI and daily calories to loan payments and compound interest — with instant results as you type.
Every calculator runs entirely in your browser, so your numbers stay private. No signup, no limits, no fuss — just fast, accurate answers.
Calculators (12 free tools)
BMI Calculator
Your BMI, category, and healthy weight range — from height and weight in seconds.
Use toolCalorie Calculator
Your BMR, TDEE, and calorie targets for losing, maintaining, or gaining weight.
Use toolLoan / EMI Calculator
Monthly EMI, total interest, and full amortization — from loan amount, rate, and term.
Use toolCompound Interest Calculator
Future value, interest earned, and yearly growth — with monthly contributions.
Use toolTip Calculator
Tip amount, bill total, and per-person share — split any bill in seconds.
Use toolDiscount Calculator
Sale prices, savings, and reverse discounts — see exactly what you pay and what you save.
Use toolUnit Converter
Convert length, weight, and temperature instantly — metric to imperial and back.
Use toolPregnancy Due Date Calculator
Estimate your due date from your last period — plus week-by-week progress and trimester.
Use toolGPA Calculator
Compute your GPA from courses, grades, and credits — add as many rows as you need.
Use toolFuel Cost Calculator
Trip fuel costs in seconds — distance, efficiency, and price to total cost.
Use toolAge Calculator
Enter your birth date — get your exact age in years, months and days, plus a countdown to your next birthday.
Use toolPercentage Calculator
Three percentage calculators in one: X% of Y, X is what % of Y, and percentage increase or decrease.
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