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Calculators, converters, generators, and checks that finish the job in seconds. No account, no detour, no data harvesting.
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Everyday problems, covered.
Finance
Plan loans, investments, pricing, taxes, and everyday money decisions.
Health & Fitness
Useful personal health estimates for planning, tracking, and better habits.
Math
Fast calculators for percentages, statistics, geometry, and number problems.
Date & Time
Calculate dates, durations, time zones, timestamps, and working days.
Text
Count, clean, transform, compare, and analyze text without uploading it.
Developer
Format, validate, encode, decode, and debug common developer data.
Security
Generate strong credentials and validate identifiers locally in your browser.
Image & Data
Convert images and structured data quickly, privately, and for free.
SEO & Marketing
Create clean search, social, campaign, and technical SEO assets.
Education
Solve grades, probability, number theory, and classroom calculations.
Connected workflows
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Mortgage Calculator
Estimate monthly mortgage payments, total interest, and total repayment cost.
FinanceLoan Calculator
Calculate a loan payment schedule from principal, rate, and term.
FinanceCompound Interest Calculator
Project investment growth with regular compounding and contributions.
FinanceROI Calculator
Calculate return on investment from cost and final value.
FinanceCurrency Converter
Convert major world currencies using current reference exchange rates.
FinanceBMI Calculator
Calculate adult body mass index and see the standard weight category.
Health & FitnessCalorie Calculator
Estimate daily calories using the Mifflin–St Jeor equation and activity level.
Health & FitnessMacro Calculator
Split daily calories into protein, carbohydrates, and fat targets.
Health & FitnessPercentage Calculator
Calculate percentages, percentage shares, and percentage differences.
MathAge Calculator
Calculate exact age in years, months, days, and total elapsed days.
Date & TimeTime Zone Converter
Convert a date and time between popular IANA time zones.
Date & TimeUnix Timestamp Converter
Convert Unix seconds or milliseconds to a human-readable date and back.
Date & TimeBuilt differently
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