Financial, health, math, and conversion calculators built for precision.
Calculate percentage changes, percentage differences, and value percentages.
Add, subtract, multiply, and divide fractions with instant GCD simplification and decimal conversion.
Perform scientific trigonometry, logarithms, exponentials, factorials, and memory operations.
Calculate exact chronological age in years, months, days, hours, minutes, and seconds.
Calculate the arithmetic average, count, sum, minimum, maximum, and range of any dataset.
Calculate the arithmetic mean (μ) of any dataset with step-by-step summation working.
Find the middle value of an odd or even dataset with automatic ascending sorting.
Identify unimodal, multimodal, or no-mode distributions with frequency tables.
Calculate basic, independent, mutually exclusive, and conditional event probabilities.
Simplify ratios to lowest terms via GCD and solve missing proportion values (A:B = C:X).
Convert decimals to simplified fractions, percentages, binary, hex, and scientific notation.
Perform matrix addition, subtraction, multiplication, transpose, determinants, and inverses.
Solve quadratic equations ax² + bx + c = 0 with real and complex roots, discriminant, and vertex.
Solve linear equations (ax + b = c) and quadratic equations step-by-step.
Calculate population (σ) and sample (s) standard deviation, variance, and mean.
Calculate exact duration in years, months, weeks, days, hours, and seconds between dates.
Add or subtract time durations in hours, minutes, and seconds.
Live ticking countdown timer for future dates, deadlines, and events.
Calculate business days between dates excluding weekends and custom holidays.
Convert time across global time zones, compare current local times, and calculate UTC offsets.
Calculate total cumulative duration across multiple work shifts or time segments.
Calculate concrete volume, premix 60lb/80lb bags needed, and weight for slabs and footings.
Calculate wall area, door/window deductions, paint gallons/liters needed, and can counts.
Calculate floor and wall tile quantities, waste allowances, and box counts.
Calculate room flooring material required with waste allowance and cost estimates.
Calculate roof pitch surface area, roofing squares, shingle bundles, and material cost.
Calculate bricks needed for masonry walls, mortar bags, and waste allowance.
Calculate driveway gravel volume, weight in tons, and dump truckload estimates.
Calculate Voltage (V), Current (I), Resistance (R), and Power (P) using Ohm's Law.
Calculate electric potential difference in Volts from current, resistance, or power.
Calculate electrical power in Watts and kilowatt-hours (kWh) energy consumption.
Decode 4-band and 5-band resistor color rings into resistance value and tolerance.
Calculate electrical Watts and mechanical horsepower (HP) from force, velocity, or torque.
Calculate force using Newton's Second Law (F = m × a) in Newtons, kgf, and lbf.
Calculate rotational torque (τ = F × r × sin θ) in Newton-meters and Pound-feet.
