CalCulator

CalCulator · Free Online Calculators

CalCulator

Free, fast, and private online calculators for percentage, BMI, EMI, mortgage, SIP, age, tip, discount, unit conversion, and more. No signup required.

Browse all calculators Try percentage calculator

Popular calculators

High-demand tools people search for every day — free, fast, and private.

%
Math & Percentages

Percentage Calculator

Calculate percentages instantly — find X% of a number, reverse percentages, percent change, increases, and dec…
BMI
Health & Fitness

BMI Calculator

Calculate your Body Mass Index (BMI) in seconds using kilograms & centimeters or pounds & inches. See your WHO…
Age
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…
EMI
Finance & Loans

EMI Calculator

Plan any loan with a bank-style EMI calculator. Enter amount, interest rate, and tenure to see monthly EMI, to…
Home
Finance & Loans

Mortgage Calculator

Estimate your monthly mortgage payment from home price, down payment, interest rate, and loan term — plus tota…
CI
Finance & Loans

Compound Interest Calculator

Project how savings and investments grow with compound interest. Add optional monthly contributions to model r…
Tip
Everyday Tools

Tip Calculator

Calculate tip and split the bill fairly. Enter bill total, tip percent, and number of people for instant per-p…
Off
Everyday Tools

Discount Calculator

See the real sale price and how much you save. Enter original price and discount percent for instant results.…
⇄
Converters

Unit Converter

Convert length, weight, temperature, volume, area, speed, and digital storage units instantly. Accurate consta…
$
Finance & Loans

Salary Calculator

Convert any pay period into yearly, monthly, weekly, daily, and hourly amounts so you can compare job offers f…
Tax
Finance & Loans

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.…
Date
Everyday Tools

Date Difference Calculator

Count the exact days, weeks, months, and years between any two dates. Fast and calendar-accurate.…
Cal
Health & Fitness

Calorie Calculator (BMR & TDEE)

Estimate your daily calorie needs with the Mifflin-St Jeor BMR formula and activity-based TDEE for maintenance…
Fuel
Everyday Tools

Fuel Cost Calculator

Plan road trips with a clear fuel budget. Enter distance, vehicle efficiency, and fuel price to estimate total…
GPA
Math & Percentages

GPA Calculator

Calculate your weighted GPA on a 4.0 scale. Enter letter grades and credit hours — perfect for semester planni…
Mk
Math & Percentages

Marks Percentage Calculator

Convert obtained marks and total marks into a percentage instantly, with a simple indicative grade guide.…
SIP
Finance & Loans

SIP Calculator

Project your SIP maturity value from monthly investment, expected return rate, and tenure. See invested amount…
SI
Finance & Loans

Simple Interest Calculator

Calculate simple interest and maturity amount from principal, annual rate, and time — the classic I = PRT/100 …
Inf
Finance & Loans

Inflation Calculator

See how inflation changes the future cost of goods and the real value of money over years.…
Due
Health & Fitness

Pregnancy Due Date Calculator

Estimate your due date from the first day of your last menstrual period (LMP) using Naegele's rule, plus gesta…
IW
Health & Fitness

Ideal Weight Calculator

Estimate ideal body weight (IBW) from height using the Devine and Robinson formulas — useful as a screening re…
H2O
Health & Fitness

Water Intake Calculator

Estimate how much water to drink daily from your weight, activity level, and climate extras.…
Run
Health & Fitness

Running Pace Calculator

Convert race distance and finish time into average pace and speed — ideal for 5K, 10K, half marathon training.…
Avg
Math & Percentages

Average Calculator

Paste a list of numbers to get the mean (average), median, sum, and range — perfect for grades, expenses, and …
¼
Math & Percentages

Fraction Calculator

Simplify any fraction and convert it to decimal and percentage using exact GCD reduction.…
Time
Everyday Tools

Time Calculator

Add or subtract time durations for work logs, workouts, videos, and scheduling — results in h:m:s and decimal …
H:M
Converters

Hours to Minutes Calculator

Convert hours and minutes to decimal hours — or decimal hours back to hh:mm — for timesheets and billing.…
Area
Converters

Square Footage Calculator

Calculate floor area from length and width. Supports feet or meters and multiple identical rooms.…
PM
Finance & Loans

Profit Margin Calculator

Find profit, profit margin, and markup from cost and selling price — essential for pricing products and servic…
BE
Finance & Loans

Break-Even Calculator

Find how many units you must sell to cover fixed and variable costs — plus break-even revenue.…
Off+
Everyday Tools

Stacked Discount Calculator

Apply up to three successive discounts and see the real final price and effective percent off — because 20% + …

Why CalCulator?

CalCulator is built for people who need a correct answer in seconds — students checking percentages, shoppers verifying discounts, homebuyers estimating mortgage payments, and anyone converting units on the go.

SEO-friendly, AdSense-ready, Namecheap-ready

  • Static HTML pages that load fast on shared hosting (upload the public folder to Namecheap public_html).
  • Unique titles, meta descriptions, FAQ schema, breadcrumbs, sitemap, and internal links on every calculator.
  • Privacy Policy and Terms included so you can apply for Google AdSense.
  • All calculations run client-side — no database and no user accounts to maintain.

How we keep tools trustworthy

Each calculator shows the formula, worked examples, and FAQs. Finance and health results are estimates for planning — always confirm critical decisions with a qualified professional.