Free Online Calculators
& Everyday Tools
Fast, accurate tools for finance, health, math, and daily life. No sign-up. No downloads. Works instantly in your browser.
Most Popular Calculators
Percentage Calculator Percent of a number, change & more Mortgage Calculator Monthly payment & total interest BMI Calculator Body mass index & weight category Age Calculator Exact age in years, months, days Compound Interest Watch your savings grow Tip Calculator Tip & split the bill easily Calorie Calculator Daily calorie needs (BMR & TDEE) Loan Calculator Payment & total cost of any loan
Browse by Category
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Finance
Mortgage, loan, interest & money tools
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Health
BMI, calorie & fitness calculators
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Math
Percentage, fractions & everyday math
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Date & Time
Age, dates & time calculations
Why KodaTools?
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Instant resultsCalculations happen as you type — no buttons, no page reloads, no waiting.
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Private by designEverything runs in your browser. We never see or store your numbers.
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Always freeNo accounts, no subscriptions, no hidden fees. Every tool is free to use.