Online Calculators | Convertora

Basic Calculator

Handle everyday arithmetic quickly.

Scientific Calculator

Evaluate common scientific expressions.

Percentage Calculator

Calculate percentages and percentage changes.

Fraction Calculator

Add, subtract, multiply and divide fractions.

Average Calculator

Find the arithmetic mean of a number set.

Random Number Generator

Generate a random number within a range.

Mortgage Calculator

Estimate monthly mortgage payments.

Loan Calculator

Estimate loan payments and total interest.

Interest Calculator

Calculate simple interest over time.

Compound Interest Calculator

Project compound growth and contributions.

Investment Calculator

Project investment value and returns.

Tax Calculator

Estimate tax from a rate and amount.

BMI Calculator

Calculate body mass index from height and weight.

Calorie Calculator

Estimate daily calorie requirements.

Body Fat Calculator

Estimate body fat percentage.

BMR Calculator

Estimate basal metabolic rate.

Age Calculator

Calculate age between two dates.

Date Difference Calculator

Find the duration between two dates.

Time Calculator

Add and subtract time durations.

Countdown Calculator

Calculate time remaining to a date.

Time Zone Converter

Compare times across global time zones.

Density Calculator

Calculate density, mass or volume.

Pressure Calculator

Calculate pressure from force and area.

Force Calculator

Calculate force from mass and acceleration.

Energy Calculator

Calculate work and energy relationships.

Power Calculator

Calculate power from work and time.

Torque Calculator

Calculate torque from force and distance.

Geometry Calculator

Calculate common shape measurements.

Binary Converter

Convert values to and from binary.

Hex Converter

Convert values to and from hexadecimal.

Decimal Converter

Convert decimal values between number bases.

Base Converter

Convert numbers between bases 2 and 36.

Bandwidth Calculator

Estimate transfer time and throughput.

File Size Converter

Convert digital file size units.

Tip Calculator

Calculate a tip and total bill.

Discount Calculator

Calculate sale price and savings.

Split Bill Calculator

Divide a bill between people.

Cooking Converter

Convert common cooking measurements.

Currency Converter

Convert common world currencies.

Statistics Calculator

Calculate common descriptive statistics.

Probability Calculator

Calculate simple event probabilities.

GPA Calculator

Calculate grade point average.

Grade Calculator

Calculate course grades and required scores.

Savings Calculator

Project savings contributions and growth.

Retirement Calculator

Estimate long-term retirement savings.

Inflation Calculator

Compare purchasing power over time.

ROI Calculator

Calculate return on investment.

Ideal Weight Calculator

Estimate a reference weight range.

Water Intake Calculator

Estimate daily water requirements.

Pregnancy Calculator

Estimate pregnancy dates and milestones.

Pace Calculator

Calculate running pace, time and distance.

Days Calculator

Add or subtract days from a date.

Business Days Calculator

Count working days between dates.

Area Calculator

Calculate area for common shapes.

Volume Calculator

Calculate volume for common solids.

Concrete Calculator

Estimate concrete volume and materials.

Paint Calculator

Estimate paint required for a surface.

Tile Calculator

Estimate tile quantity and coverage.

Flooring Calculator

Estimate flooring material requirements.

Roof Calculator

Estimate roof area and materials.

JSON Formatter

Format and inspect JSON data.

JSON Validator

Check JSON syntax and structure.

URL Encoder Decoder

Encode or decode URL components.

HTML Encoder Decoder

Encode or decode HTML entities.

Timestamp Converter

Convert Unix timestamps and dates.

Password Generator

Generate strong random passwords locally.

Word Counter

Count words, characters and lines.

Character Counter

Count characters with or without spaces.

Case Converter

Change text between common letter cases.

Text Sorter

Sort lines alphabetically or numerically.

Duplicate Line Remover

Remove repeated lines from text.

Slug Generator

Create clean URL slugs from text.

Unit Price Calculator

Compare cost per unit between products.

Geometry Calculator

Calculate measurements for common plane and solid shapes.

Algebra Calculator

Simplify and evaluate common algebraic expressions.

Equation Solver

Solve common equations step by step.

Salary Calculator

Convert annual salary into monthly, weekly and hourly pay.

Paycheck Calculator

Estimate take-home pay from gross earnings and deductions.

Credit Card Calculator

Estimate payoff time, payments and credit card interest.

Debt Payoff Calculator

Build a practical payoff schedule for multiple debts.

Macro Calculator

Estimate daily protein, carbohydrate and fat targets.

TDEE Calculator

Estimate total daily energy expenditure.

Heart Rate Calculator

Estimate target heart-rate training zones.

Sleep Calculator

Plan sleep and wake times around complete sleep cycles.

Stair Calculator

Estimate stair rise, run, steps and stringer dimensions.

Ohm's Law Calculator

Calculate voltage, current, resistance and power.

Voltage Calculator

Calculate electrical voltage from current and resistance.

Current Calculator

Calculate electrical current from voltage and resistance.

Resistance Calculator

Calculate electrical resistance from voltage and current.

Watt Calculator

Calculate electrical power from voltage and current.

UUID Generator

Generate standards-compatible unique identifiers locally.

Hash Generator

Generate common cryptographic hashes from text.

Regex Tester

Test regular expressions against sample text.

Color Converter

Convert colors between HEX, RGB, HSL and related formats.

Cron Generator

Build and explain common cron schedule expressions.

Text Compare

Compare two text blocks and identify differences.

Text Cleaner

Remove unwanted spaces, line breaks and formatting.

Reading Time Calculator

Estimate reading and speaking time from word count.

Image Compressor

Reduce image file size while preserving useful visual quality.

Image Resize

Resize image dimensions for web, social and document use.

Image Converter

Convert images between common file formats.

PDF Compressor

Reduce PDF file size for easier storage and sharing.

PDF Converter

Convert supported documents and images to or from PDF.

Calculator categories

Math Calculators

Simple tools for common numerical problems.

Finance Calculators

Plan borrowing, saving and investment decisions.

Health Calculators

Practical personal health and body measurements.

Date & Time Tools

Calculate dates, durations and time intervals.

Engineering Calculators

Reference tools for science and engineering work.

Developer Tools

Formatting, encoding and number-system utilities.

Text Tools

Fast helpers for writing and text processing.

Everyday Tools

Quick helpers for common daily tasks.

File & Image Tools

Practical file, image and PDF utilities.