EV Charging Cost Calculator

Estimate energy, cost, and range added for EV charging.

Fuel Cost Calculator

Estimate fuel needed and cost for a drive.

Gas Mileage Calculator

Calculate fuel economy from miles driven and gallons used.

Maintenance Schedule Calculator

See how much distance remains until common vehicle maintenance items are due.

Tire Size Calculator

Calculate tire diameter, circumference, and revs per mile.

Trip Cost Calculator

Estimate total and per-person driving trip cost with unit-aware distance and fuel economy.

Break-Even Calculator

Estimate units and revenue needed to break even.

Cash Flow Runway Calculator

Estimate how many months of cash remain at the current burn rate.

Commission Calculator

Calculate tiered commission and total pay.

Customer Acquisition Cost Calculator

Calculate how much sales and marketing spend brings in each new customer.

Discount Calculator

Calculate sale price, discount amount, tax, and final price.

Hourly Rate Calculator

Convert annual salary into gross and estimated net hourly, weekly, and monthly pay.

Ingredient Weight Calculator

Convert recipe volume to usable weight after waste or trimming loss.

Markup Calculator

Calculate selling price from markup or maximum cost from a target margin.

Overtime Calculator

Calculate regular pay, overtime pay, and total pay.

Profit Margin Calculator

Calculate profit, margin, cost ratio, or maximum cost for a target margin.

Inflation / Purchasing Power Calculator

Estimate how inflation reduces the future value of today's money.

ROI Calculator

Calculate net profit, ROI, and investment multiple.

Salary Calculator

Convert hourly pay into gross and estimated net weekly, monthly, and annual salary.

Sales Tax Calculator

Calculate sales tax and total price.

Unit Price Calculator

Compare two products by price per unit.

Area Calculator

Calculate rectangular area in square feet, yards, and meters.

Board Feet Calculator

Estimate lumber board feet.

Concrete Calculator

Estimate concrete volume and 80 lb bags.

Cubic Yards Calculator

Convert project dimensions into cubic yards.

Deck Spacing Calculator

Estimate deck board count and remaining width.

Flooring Calculator

Estimate flooring area and boxes with waste included.

Gravel Calculator

Estimate gravel volume, tons, and material cost.

Mulch Calculator

Estimate mulch volume, bags, and cost.

Paint Calculator

Estimate paint needed from wall area, coats, and coverage.

Roofing Calculator

Estimate roof area, squares, bundles, and cost.

Slope Calculator

Calculate slope percent, angle, and rise-run ratio.

Stair Calculator

Estimate risers, treads, and total run.

Tank Volume Calculator

Calculate cylindrical tank volume.

Tile Calculator

Estimate tile count for a rectangular area with waste.

Topsoil Calculator

Estimate topsoil volume for a rectangular area.

Final Exam Score Calculator

Find the final exam score needed for a target grade.

Course Cost / ROI Calculator

Calculate cost per credit, lecture value, and course ROI.

GPA Calculator

Calculate GPA from courses, credits, and grades.

GPA Plan Calculator

Find the GPA needed on future credits to reach a target.

Grade Calculator

Calculate a weighted course grade from assignments and exams.

Reading Time Calculator

Estimate reading time from word count and reading speed.

Weighted Grade Calculator

Combine weighted grade components into an overall grade.

Amortization Calculator

Estimate payment, remaining balance, and principal paid for an amortized loan.

Annuity Payment Calculator

Estimate the payment needed for an annuity present value.

APR Calculator

Estimate annual percentage rate from finance charges and loan term.

APY Calculator

Convert a nominal annual rate into annual percentage yield.

Budget Calculator

Compare monthly income against common expense categories.

Car Loan Calculator

Estimate an auto loan payment with taxes, fees, down payment, and trade-in.

Compound Interest Calculator

Project savings or investment growth with monthly contributions.

Cost of Living Calculator

Compare monthly budgets and estimate income needed for a new cost level.

Credit Card Payoff Calculator

Estimate credit card payoff time and interest with extra payments.

Debt Payoff Calculator

Estimate payoff time, total interest, and total paid for a debt.

Depreciation Calculator

Estimate asset depreciation and book value.

DCA Calculator

Compare lump-sum investing with dollar-cost averaging over time.

Effective Interest Rate Calculator

Convert nominal interest into an effective annual rate.

Future Value Calculator

Project the future value of a present amount.

Inflation Calculator

Estimate future cost and purchasing power after inflation.

Investment Return Calculator

Calculate net return, total return rate, and annualized return.

Loan Payment Calculator

Estimate the monthly payment, total repayment, and total interest for a fixed-rate loan.

Mortgage Calculator

Estimate a mortgage payment with taxes, insurance, and HOA costs.

Net Present Value Calculator

Calculate NPV from cash flows and a discount rate.

Paycheck Calculator

Estimate gross pay, taxes, deductions, and take-home pay.

Present Value Calculator

Discount a future amount back to today's value.

Mortgage Refinance Calculator

Compare current and refinance mortgage payments, savings, and break-even time.

Rent vs Buy Calculator

Compare five-year renting costs with estimated buying costs.

Retirement Calculator

Project retirement savings from age, savings, contributions, and return.

Simple Interest Calculator

Calculate interest and total amount with a fixed-rate simple interest formula.

Savings Goal Calculator

Estimate how long it will take to reach a savings target.

Tip Calculator

Calculate a tip, total bill, and split amount per person.

BMI Calculator

Estimate body mass index and a healthy-weight range.

Body Fat Calculator

Estimate body fat percentage with tape measurements.

Calorie Calculator

Estimate maintenance, cutting, or bulking calories from body stats and activity.

Pregnancy Due Date Calculator

Estimate a pregnancy due date from last period date and cycle length.

Heart Rate Zone Calculator

Estimate moderate and vigorous heart-rate zones.

Ideal Weight Calculator

Estimate ideal body weight and a healthy BMI range.

Macro Calculator

Convert daily calories and macro percentages into grams of protein, carbs, and fat.

One-Rep Max Calculator

Estimate theoretical one-rep max strength from a lifted weight and reps.

Pace Calculator

Calculate running or walking pace and speed.

Sleep Cycle Calculator

Find bedtime options from a target wake time.

Calorie Calculator

Estimate maintenance, cutting, or bulking calories from body stats and activity.

Water Intake Calculator

Estimate daily water intake from body weight and activity.

Mean, Median, Mode, and Sum Calculator

Find the mean, median, mode, sum, minimum, and maximum from a pasted list of numbers.

Average Rate of Change Calculator

Find the slope between two points.

Complex Number Calculator

Add, subtract, multiply, and divide complex numbers.

Circle Calculator

Calculate circle diameter, circumference, and area.

Cone Calculator

Calculate cone slant height, surface area, and volume.

Confidence Interval Calculator

Estimate a confidence interval for a sample mean with z or t assumptions.

Cylinder Calculator

Calculate cylinder surface area and volume.

Cube Calculator

Calculate cube volume, surface area, and diagonals from one edge.

Derivative Power Rule Calculator

Apply the power rule and evaluate the derivative.

Distance Formula Calculator

Find the distance between two points.

Exponent Calculator

Raise a base to any exponent.

Fraction Calculator

Add, subtract, multiply, and divide two fractions.

GCF LCM Calculator

Find greatest common factor and least common multiple.

Integral Power Rule Calculator

Apply the power rule for integrals and evaluate a definite integral.

Limit Evaluator

Evaluate a simple function at a point.

Determinant Calculator

Calculate a square matrix determinant with elimination steps.

Eigenvalues Calculator

Find eigenvalues and eigenvectors for small square matrices.

Matrix Calculator

Edit two matrices and inspect common linear algebra operations.

System of Equations Calculator

Solve an augmented matrix and classify the solution set.

Linear Equation Solver

Solve y = mx + b for a chosen x value.

Linear Regression Calculator

Fit a best-fit line to pasted points.

Logarithm Calculator

Calculate logarithms with any positive base.

Midpoint Formula Calculator

Find the midpoint between two points.

Modulo Calculator

Find quotient and remainder after division.

Parallelogram Calculator

Calculate parallelogram area, perimeter, height, and diagonals.

Percentage Calculator

Calculate percent-of, percent share, and percent changes.

Percentile Calculator

Find a percentile value from a number list and show the sorted interpolation.

P-Value Calculator

Find one-tailed or two-tailed p-values from a z or t statistic.

Permutation Combination Calculator

Calculate nPr and nCr.

Polygon Calculator

Calculate area and perimeter from polygon vertices.

Polynomial Evaluator

Evaluate ax^3 + bx^2 + cx + d at x.

Prime Factorization Calculator

Break an integer into prime factors.

Pyramid Calculator

Calculate square pyramid area, surface area, and volume.

Probability Calculator

Calculate probability and odds from outcomes.

Programmer Calculator

Use a keypad calculator for binary, decimal, hexadecimal, and bitwise math.

Quadratic Formula Calculator

Solve ax^2 + bx + c with the quadratic formula.

Quartile Calculator

Find quartiles, median, and interquartile range with selectable methods.

Ratio Calculator

Simplify a ratio and scale it to an equivalent value.

Rectangle Calculator

Calculate rectangle area, perimeter, and diagonal.

Rectangular Prism Calculator

Calculate rectangular prism volume, surface area, and space diagonal.

Regular Polygon Calculator

Calculate perimeter, area, and interior angle for a regular polygon.

Rhombus Calculator

Calculate rhombus area, perimeter, height, and diagonals.

Right Triangle Calculator

Solve hypotenuse, area, perimeter, and angle from two legs.

Rounding Calculator

Round a number to decimal places or a custom increment.

Scientific Calculator

Use a keypad calculator for powers, roots, trigonometry, logarithms, and constants.

Scientific Notation Calculator

Convert a number into scientific notation.

Significant Figures Calculator

Count and round significant figures.

Sphere Calculator

Calculate sphere surface area and volume.

Square Calculator

Calculate square area, perimeter, and diagonal from one side.

Square Root Calculator

Calculate the square root of a non-negative number.

Standard Calculator

Use a simple keypad calculator for everyday arithmetic.

Standard Deviation Calculator

Calculate mean, variance, and standard deviation from a list of values.

Trapezoid Calculator

Calculate trapezoid area, perimeter, midline, and base angles.

System of Two Equations Calculator

Find the intersection point for two lines.

Triangle Calculator

Calculate triangle perimeter and area from three sides.

Triangular Prism Calculator

Calculate triangular prism area, surface area, and volume from three sides.

Right Triangle Solver

Solve a right triangle from one known side and one acute angle.

Z Score Calculator

Calculate how many standard deviations a value is from the mean.

Acceleration Calculator

Calculate acceleration from initial velocity, final velocity, and time.

Buoyant Force Calculator

Calculate buoyant force and displaced mass in a fluid.

Centripetal Force Calculator

Calculate inward force for circular motion.

Coulomb's Law Calculator

Calculate electrostatic force between two charges.

Density Calculator

Solve density, mass, or volume and use common material densities.

Newton's Second Law Calculator

Solve force, mass, or acceleration with F = ma.

Friction Calculator

Calculate friction force from coefficient and normal force.

Gravitational Force Calculator

Calculate gravitational attraction between two masses.

Gravitational Potential Energy Calculator

Calculate potential energy from mass, height, and gravity.

Hooke's Law Calculator

Calculate restoring force from spring constant and displacement.

Ideal Gas Law Calculator

Solve pressure, volume, or temperature from PV = nRT.

Kinetic Energy Calculator

Solve kinetic energy, mass, or velocity.

Momentum and Impulse Calculator

Calculate momentum change, impulse, and average force.

Ohm's Law Calculator

Solve voltage, current, or resistance and calculate circuit power.

Pressure Calculator

Calculate pressure from force and area.

Projectile Motion Calculator

Estimate max height, range, and flight time for a projectile.

Speed Distance Time Calculator

Solve speed, distance, or time from the other two values.

Simple Pendulum Calculator

Calculate pendulum period, frequency, and angular frequency.

Snell's Law Calculator

Calculate refraction and critical angle with Snell's law.

Torque Calculator

Calculate torque from force, lever arm, and angle.

Wavelength and Frequency Calculator

Calculate wavelength from wave speed and frequency.

Work Done Calculator

Calculate work from force, distance, and angle.

Work-Energy Theorem Calculator

Calculate net work from a change in kinetic energy.

Add / Subtract Time Calculator

Add or subtract days, hours, minutes, and seconds from a date and time.

Age Calculator

Calculate age, total days lived, and days until the next birthday.

Business Days Calculator

Count weekdays between two dates with optional holidays.

Countdown Calculator

See how much time remains until a target date and time.

Date Difference Calculator

Find the exact span between two calendar dates.

Event Time Announcer

Create a shareable event time list for global audiences.

Meeting Planner

Compare a meeting window across timezones.

Moon Phase Calculator

Find moon phase and illumination for a date.

Moonrise Moonset Calculator

Estimate moonrise and moonset for a location and date.

Sunrise Sunset Calculator

Estimate sunrise, sunset, and daylight for a date and location.

Time Card Calculator

Calculate work hours, breaks, overtime, and gross pay.

Time Duration Calculator

Convert hours, minutes, and seconds into total duration units.

Timezone Comparison Calculator

Compare the same moment across two timezones.

Work Shift Planner

Calculate whether a target date is on or off shift in a repeating rotation.

Work Hours Calculator

Calculate daily and weekly work hours with breaks, overtime, and pay.