Math Calculators

From basic arithmetic to advanced statistics and probability

Basic Calculator

Add, subtract, multiply, divide

Scientific Calculator

Trig, logs, exponents

Fraction Calculator

Add, subtract, multiply fractions

Percentage Calculator

Percentages, increase, decrease

Ratio Calculator

Simplify and compare ratios

Power / Root

Powers, square & cube roots

Modulo Calculator

Find the remainder of division

Random Numbers

Generate random in any range

Base Converter

Binary, hex, octal conversion

Scientific Notation

Convert large & small numbers

Statistics Calculator

Mean, median, mode, std dev

Proportion Calculator

Solve a/b = c/d

Probability Calculator

Event probability, odds

Combinations

C(n,r) and P(n,r)

Standard Deviation

Sample & population stats

Triangle Calculator

SSS, SAS, ASA, AAS

Pythagorean Theorem

a² + b² = c²

Quadratic Solver

Solve ax²+bx+c=0

GCF & LCM

Greatest common factor & LCM

Factorial (n!)

Calculate n factorial

Weighted Average

Weighted mean calculator

Percentage Change

Increase & decrease %

Grade Calculator

What grade do I need?

Concrete Calculator

Cubic yards & bags

Area Calculator

All shapes & units

CGPA Calculator

Cumulative GPA across semesters

Paint Calculator

Gallons needed for any room

Roofing Calculator

Shingles & bundles estimate

Drywall Calculator

Sheets, compound & tape

Z-Score Calculator

Standard score calculator

Matrix Calculator

Add, multiply, determinant

Finance Calculators

Plan, save, and grow your money with confidence

Loan Calculator

Monthly payments & schedule

Mortgage Calculator

Home loan payments & total

Compound Interest

Investment growth & future value

Tip Calculator

Calculate tips & split bills

VAT Calculator

Tax amount & gross/net price

Depreciation

Asset value over time

Savings Calculator

Future value with deposits

Debt Payoff

Plan your debt payoff

ROI Calculator

Return on investment %

CAGR Calculator

Compound annual growth rate

Salary Calculator

Gross to net, hourly to annual

Markup / Discount

Markup, discount, profit margin

Currency Converter

Live exchange rates

Inflation Calculator

Purchasing power over time

Tax Calculator

Add or remove sales tax

GST Calculator

AU/NZ/CA/IN GST rates

Discount Calculator

Final price after discount

Auto Loan

Car payments & amortization

Credit Card Payoff

Pay off card debt faster

Student Loan

Repayment plans comparison

Amortization

Full payment schedule

House Affordability

How much house can I afford?

Net Worth Calculator

Assets minus liabilities

Retirement (401K)

Savings projection & growth

Investment Calculator

Future value & compound growth

Simple Interest

I=PRT formula calculator

Mortgage Payoff

Extra payments impact

Paycheck Calculator

Take home pay after tax

Budget Calculator

50/30/20 rule planner

DTI Ratio

Debt-to-income ratio

FIRE Calculator

Retire early planning

1099 vs W-2

Contractor vs employee tax

Profit Margin

Gross & net margin

Break-Even

Break-even point analysis

Bond Calculator

Yield & price analysis

CD Calculator

Certificate of deposit

Annuity Calculator

Present & future value

Car Lease

Monthly lease payment

Overtime Pay

OT wages calculator

Dividend Yield

Stock dividend income

NPV Calculator

Net Present Value

Rent vs Buy

Should you rent or buy?

Health & Fitness

Track your health and fitness goals with accurate calculators

BMI Calculator

Body Mass Index

Calorie Calculator

Daily calorie needs

Ideal Weight

Healthy weight range

Body Fat Calculator

Body fat % (Navy method)

Heart Rate Zones

Training zones by age

Water Intake

Daily hydration needs

Pregnancy Calculator

Due date & weeks

Unit Converter

Length, weight, temp, volume

GPA Calculator

Grade point average

TDEE Calculator

Daily calorie expenditure

Macro Calculator

Protein, carbs & fat

Ovulation Calculator

Fertile window & cycle

BMR Calculator

Basal metabolic rate

Pace Calculator

Running & walking pace

Sleep Calculator

Optimal bedtime & wake time

Net Carb Calculator

Keto & low carb tracking

One-Rep Max (1RM)

Strength training zones

Calorie Deficit

Weight loss calculator

VO2 Max

Cardiovascular fitness

Blood Pressure

BP category classifier

Body Surface Area

BSA calculator

Due Date Calculator

Pregnancy due date

BAC Calculator

Blood alcohol content

GFR Calculator

Kidney function test

Calories Burned

Exercise calorie burn

Date & Time Tools

Calculate dates, ages, and time zones instantly

Date Calculator

Days between dates

Age Calculator

Exact age in years, months, days

Business Days

Working days between dates

Countdown Timer

Live countdown to any date

Stopwatch & Timer

Stopwatch and countdown timer

Week Number

ISO week number

Time Zone Converter

Convert between time zones

Leap Year Checker

Is it a leap year?

World Clock

Time zones worldwide

Hours Calculator

Work hours & timesheets

Time Duration

Hours between two times

Date Format Converter

ISO, US, UK formats

Developer Tools

Handy utilities for developers and designers

Password Generator

Strong, secure passwords

Word Counter

Words, chars, reading time

Base64 Encoder

Encode & decode Base64

URL Encoder

Encode & decode URLs

Hash Generator

MD5, SHA-1, SHA-256

JSON Formatter

Format, validate, minify

Color Converter

HEX, RGB, HSL

Roman Numerals

Number to Roman & back

QR Code Generator

URLs, text, WiFi, email

Lorem Ipsum Generator

Placeholder text

Regex Tester

Test regular expressions

Text Case Converter

UPPER, lower, Title Case

UUID Generator

v4, v1, v5 UUIDs

Subnet Calculator

IP network & CIDR

HTML Preview

Live HTML/CSS/JS editor

XML/CSV/JSON Converter

Data format conversion

Color Palette Generator

Harmonious color schemes

Unix Timestamp

Epoch time converter

CSS Gradient

CSS gradient creator

Meta Tag Generator

SEO meta tags

JSON to CSV

Data format converter

HTML Minifier

Minify code

Markdown Preview

Live Markdown editor

HTML Entity Encoder

Encode & decode entities

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