Core math calculators for percentages, formulas, and everyday quantitative decisions.
Calculate age in years, months, days, and total days between two dates.
Project portfolio growth with recurring contributions, fees, taxes, inflation, and Buffett-style compounding tables.
Add, subtract, multiply, divide, simplify, and compare fractions with decimal and percent context.
Compute weighted GPA from course grades and credits on 4.0 or 5.0 scales.
Calculate base logs, natural logs, common logs, and antilogs with change-of-base support.
Perform matrix operations: add, subtract, multiply, determinant, inverse, transpose, and trace.
Solve percentages, percent change, and increase/decrease scenarios with step-by-step formulas.
Check primality, prime factors, divisors, and nearest prime neighbors.
Calculate independent, conditional, complement, and Bayes theorem probabilities.
Solve quadratic equations with discriminant, real/complex roots, and vertex form insights.
Simplify ratios, solve equivalent ratios, and split totals by ratio parts.
Convert numbers to Roman numerals and Roman numerals back to numbers.
Run advanced operations including powers, roots, logs, trigonometry, and factorial.
Calculate sample or population variance and standard deviation with step-by-step breakdown.