Online Calculators
8 free calculator tools. Instant results in your browser, no signup required.
🎂
Age Calculator
Calculate exact age in years, months, and days
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📊
Percentage Calculator
Calculate percentages, percentage change, and more
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⚖️
BMI Calculator
Calculate Body Mass Index and health category
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💰
Tip Calculator
Calculate tip amount and split bills easily
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🏦
Loan Calculator
Calculate monthly payments and total interest
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🎓
GPA Calculator
Calculate GPA from grades and credit hours
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📅
Date Calculator
Calculate days between dates or add/subtract days
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🎨
Color Picker
Pick colors and convert between HEX, RGB, and HSL
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About Our Calculators
TweakFiles offers 8 free online calculators that run entirely in your browser. Calculate your age, BMI, loan payments, GPA, tips, dates, percentages, and pick colors — all with instant results and no server uploads. Every calculator is available in 7 languages and works on any device.