Calculators
Fast, free calculators — financial, health, grades, math, and more. All browser-based.
Calculator Categories
Jump into a category index.
Loans, payments, interest, amortization, budgeting, and more.
BMI, calorie burn, nutrition, training metrics, and wellness.
Final grade, GPA, weighted scores, and class performance tools.
Percentages, probability, algebra helpers, number tools, and more.
Time/date, utilities-style calculators, and mixed general tools.
Total categories: 5.
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Featured Calculators
A starter set. As you expand, move most tools into the category folders above.
Bill (pre-tax) + tip% + optional tax% + split by people.
Exact and cumulative binomial probability.
Convert a date & time between time zones.
Find % of a value, what % one number is of another, and calculate changes.
Solve V, I, R, P with validation and clean results.
Payment (P&I) with tax, insurance, HOA, PMI.
Basic scientific functions with Deg/Rad support and history.
Fixed-rate loan math + amortization table, 0% APR fallback.
Days between dates, plus common date math.
Estimate calories burned via MET values.
Metric/imperial Body Mass Index calculator.
Age, next birthday, and breakdowns.
Tool Info
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This index may update as calculator tools are added, renamed, or reorganized into categories.