All Free Calculators
Browse every CalCulator tool — math, finance, health, converters, and everyday helpers. Each page is free, mobile-friendly, and private.
Math & Percentages
Percentage Calculator
Calculate percentages instantly — find X% of a number, reverse percentages, percent change, increases, and dec…
GPA Calculator
Calculate your weighted GPA on a 4.0 scale. Enter letter grades and credit hours — perfect for semester planni…
Marks Percentage Calculator
Convert obtained marks and total marks into a percentage instantly, with a simple indicative grade guide.…
Average Calculator
Paste a list of numbers to get the mean (average), median, sum, and range — perfect for grades, expenses, and …
Fraction Calculator
Simplify any fraction and convert it to decimal and percentage using exact GCD reduction.…
Finance & Loans
EMI Calculator
Plan any loan with a bank-style EMI calculator. Enter amount, interest rate, and tenure to see monthly EMI, to…
Mortgage Calculator
Estimate your monthly mortgage payment from home price, down payment, interest rate, and loan term — plus tota…
Compound Interest Calculator
Project how savings and investments grow with compound interest. Add optional monthly contributions to model r…
Salary Calculator
Convert any pay period into yearly, monthly, weekly, daily, and hourly amounts so you can compare job offers f…
Sales Tax & VAT Calculator
Add sales tax/VAT to a price — or reverse a tax-inclusive total to find the pre-tax amount and tax portion.…
SIP Calculator
Project your SIP maturity value from monthly investment, expected return rate, and tenure. See invested amount…
Simple Interest Calculator
Calculate simple interest and maturity amount from principal, annual rate, and time — the classic I = PRT/100 …
Inflation Calculator
See how inflation changes the future cost of goods and the real value of money over years.…
Profit Margin Calculator
Find profit, profit margin, and markup from cost and selling price — essential for pricing products and servic…
Break-Even Calculator
Find how many units you must sell to cover fixed and variable costs — plus break-even revenue.…
Health & Fitness
BMI Calculator
Calculate your Body Mass Index (BMI) in seconds using kilograms & centimeters or pounds & inches. See your WHO…
Calorie Calculator (BMR & TDEE)
Estimate your daily calorie needs with the Mifflin-St Jeor BMR formula and activity-based TDEE for maintenance…
Pregnancy Due Date Calculator
Estimate your due date from the first day of your last menstrual period (LMP) using Naegele's rule, plus gesta…
Ideal Weight Calculator
Estimate ideal body weight (IBW) from height using the Devine and Robinson formulas — useful as a screening re…
Water Intake Calculator
Estimate how much water to drink daily from your weight, activity level, and climate extras.…
Running Pace Calculator
Convert race distance and finish time into average pace and speed — ideal for 5K, 10K, half marathon training.…
Converters
Unit Converter
Convert length, weight, temperature, volume, area, speed, and digital storage units instantly. Accurate consta…
Hours to Minutes Calculator
Convert hours and minutes to decimal hours — or decimal hours back to hh:mm — for timesheets and billing.…
Square Footage Calculator
Calculate floor area from length and width. Supports feet or meters and multiple identical rooms.…
Everyday Tools
Age Calculator
Find your exact age in years, months, and days from any date of birth. Instantly see total days lived and coun…
Tip Calculator
Calculate tip and split the bill fairly. Enter bill total, tip percent, and number of people for instant per-p…
Discount Calculator
See the real sale price and how much you save. Enter original price and discount percent for instant results.…
Date Difference Calculator
Count the exact days, weeks, months, and years between any two dates. Fast and calendar-accurate.…
Fuel Cost Calculator
Plan road trips with a clear fuel budget. Enter distance, vehicle efficiency, and fuel price to estimate total…
Time Calculator
Add or subtract time durations for work logs, workouts, videos, and scheduling — results in h:m:s and decimal …
Stacked Discount Calculator
Apply up to three successive discounts and see the real final price and effective percent off — because 20% + …