Calculators

Free online calculators for unit conversion, percentages, time, and everyday math. All calculations run locally.

Unit Converters

Unit Converter Meters → Feet Feet → Meters KM → Miles Miles → KM KG → Pounds Pounds → KG °C → °F °F → °C CM → Inches Liters → Gallons

Percentage Calculators

Percentage Calculator Percentage Of Percentage Increase Percentage Decrease Reverse Percentage Percentage Change Discount Calculator VAT Calculator GST Calculator

Time & Date Calculators

Time Calculator Hours to Minutes Minutes to Hours Days to Hours Weeks to Days Seconds to Minutes Unix Timestamp to Date Date Difference Add Days to Date

Finance & Business Calculators

ROI Calculator Loan Payment Calculator Compound Interest Calculator Profit Margin Calculator Break Even Calculator Commission Calculator Average Calculator Salary Calculator

Calculator Guides

How to Convert Units Metric vs Imperial Cooking Conversions How to Calculate Percentages Understanding Time Zones Common Math Formulas How to Calculate ROI Compound Interest Guide Loan Payments Guide Break-Even Guide

Calculator Use Cases

Meters to Feet KG to Pounds Calculate Discounts Calculate Tips Days Between Dates Mortgage Affordability Retirement Savings Compare Salary Offers Business Profitability

Popular Tools

Image Resizer JSON Formatter QR Code Generator Word Counter Random Name Generator Percentage Calculator PNG to WebP Compress to 100 KB Markdown Editor

Featured Tools

Discover more tools across our collection — updated daily.

Compress Image to 4 MB Compress Image to 65 KB Blue Gradient Desert Palette Resize Image to 120×90 Summer Palette Convert SVG to JPG XML to CSV Converter Developer Case Converter Cyberpunk Gradient Resize Image to 128×128 Blue Gradient Palette Resize Image to 1179×2556 Compress Image to 85 KB Convert SVG to PNG XML Validator Convert PNG to JPG Fire Gradient

Random Tools – Free Online Tools

Free browser-based tools for image editing, PDF conversion, color exploration, QR codes, calculators, and data formatting. No signup required — everything runs locally in your browser.

Tool Categories

Image Tools – Resize, crop, convert, and compress images
Color Tools – Converters, contrast checkers, and palettes
PDF Tools – Merge, split, compress, and convert PDFs
SVG Tools – Optimize, minify, encode, and edit SVGs
Calculators – Unit converters, percentage, and time calculators
QR Code Generator – Create QR codes for URLs, text, Wi-Fi, and more
Random Generators – Generate random numbers, teams, lists, and colors
Data Formatting – Format JSON, CSV, YAML, SQL, and more
Color Palettes – Curated palettes for design and development
Gradients – CSS gradient collections and generators
Color Explorer – Browse 1,000+ colors with conversions and palettes
Developer Tools – Base64, JSON, UTM builder, and more

Popular Tools

Directories & Indexes

All Tools
Guides
Use Cases
Comparisons
Image Resizer Sizes
Compress Image Sizes
Convert Image Formats
Image Size Guides
Resize Dimensions Directory
Compression Targets Directory
Color Explorer Directory
Data Formatting Directory
Tool Directory