Free online calculators for everyday answers
AI Calculator is a collection of practical tools for math, finance, health, science, school, dates, home projects, and specialty workflows. Open the calculator you need and get a direct result without signing in.
Always free
No account wall or paywall on calculator pages.
Direct answers
Each page is built around one concrete calculation task.
Broad coverage
Categories span schoolwork, money, health, science, home projects, and more.
Browse calculator categories
Start with a topic, then jump into a dedicated calculator.
Basic Math
Fast calculators for percentages, rounding, unit rates, LCM, GCD, and long division.
Physics
Physics calculators for motion, measurements, formulas, and unit-aware problem solving.
Finance
Investment, dividends, margin, military housing, discount, and money planning calculators.
Health & Fitness
Fitness, body, wellness, military test, weight loss, and step-distance calculators.
Algebra
Solve and inspect algebra tasks including factoring, function tables, partial fractions, and polynomial behavior.
Chemistry
Chemistry helpers for molarity, dilution, significant figures, and lab-style calculations.
Shopping
Compare deals, discounts, unit rates, tips, and real purchase totals.
Astrology
Relationship, Juno, Venus, compatibility, Saturn Return, chart timing, and placement calculators.
Popular calculators
A cross-section from the full calculator directory.
Matrix Dot Product Calculator
Calculate the dot product of two matrices with step-by-step visualization.
Acceleration Calculator
Calculate displacement, velocity, acceleration, and time.
LMSYS Chatbot Arena Leaderboard
Explore historical Chatbot Arena ELO rankings, model streaks, and company trends.
Matrix Determinant Calculator
Calculate the determinant of square matrices up to 4x4 with detailed steps.
Age Calculator Between Two Dates
Calculate exact age between any start date and target date.
Dave Ramsey Investment Calculator
Compare monthly investing scenarios with Ramsey's 12% return assumption.
Eigenvalues & Eigenvectors Calculator
Find eigenvalues and eigenvectors of square matrices.
Age Difference Calculator
Calculate the exact age gap between two people from birth dates.
Dividends Calculator
Project dividend income, DRIP reinvestment, taxes, and portfolio value.
Weight Loss Calculator
Plan weight loss by date with calorie deficit, percentage, protein, and macros.