Calcly
Free tools for everyday life.
Calculate, convert, compare, and generate — simple tools that just work.
Browse by category
From everyday percentages to construction estimates and developer utilities, every category is built to grow without changing how you find a tool.
Calculators
Everyday math, made simple.
5 tools
Finance
Loans, savings, and investments.
10 tools
Home & Construction
Paint, tile, concrete, and costs.
5 tools
Automotive
Fuel, trips, and car loans.
5 tools
Travel
Trip planning tools.
1 tool
Developer Tools
Format, encode, decode, generate.
7 tools
Date & Time
Ages, dates, and durations.
3 tools
Converters
Units and encodings.
1 tool
Generators
Create text, codes, and identifiers.
3 tools
Popular tools
Start with the calculators people reach for most often.
Percentage Calculator
Percent of, change, and difference.
Open toolBMI Calculator
BMI and weight category.
Open toolTip Calculator
Tip amount, total, and per-person split.
Open toolAge Calculator
Exact age, totals, and next birthday.
Open toolUnit Converter
Length, weight, and temperature.
Open toolPassword Generator
Random passwords, created locally.
Open toolMortgage Calculator
Monthly payment and amortization summary.
Open toolCompound Interest Calculator
Estimate investment growth over time.
Open toolSalary Calculator
Annual to hourly pay conversions.
Open toolCalorie Calculator
BMR, TDEE, and calorie targets.
Open toolQR Code Generator
Create a QR code from text or a URL.
Open toolJSON Formatter
Pretty-print, minify, and validate JSON.
Open toolWhy Calcly?
Free to use
Open a tool and start calculating. There is no paywall on the core utilities.
Fast and private
Results are computed in your browser so you get an answer immediately without sending a form to a server.
No unnecessary signup
You do not need an account to format JSON, estimate a mortgage, or convert fuel economy.
Works on mobile
Inputs use the right keyboards, and layouts stay readable on a phone.
Explore Calcly
Calcly is a collection of free online tools for everyday life: calculators for percentages and pay, finance utilities for loans and savings, construction helpers for paint and concrete, automotive estimates for fuel and charging, and developer tools for JSON, encodings, and identifiers.
Each page is built around one job. You get a working calculator first, then a clear explanation of the formula, an example, and related tools if you need to go further. The catalog is designed so new tools can be added without turning the site into a maze of near-duplicate pages.