Finance

Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio and assess your health risk category based on WHO guidel

Business

Expense to Income Ratio Calculator

Calculate your expense to income ratio to understand your financial health and spending ef

Math

Percentage Calculator

Easily calculate percentages — find X% of Y, percentage change, or what percent X is of Y.

Chemistry

Stoichiometry Calculator

Calculate moles, mass, or molecules of reactants and products using stoichiometric ratios.

Finance

Calories Burned Swimming Calculator

Estimate calories burned during swimming based on stroke, duration, and body weight.

Everyday

Aspect Ratio Calculator

Calculate missing width or height from an aspect ratio, or find the ratio of any image or

Physics

Circular Motion Calculator

Calculate centripetal force, acceleration, velocity and period for an object in circular m

Chemistry

Concentration Calculator

Calculate solution concentration in molarity, mass/volume percent, and parts per million (

Finance

Cholesterol Ratio Calculator

Calculate total cholesterol to HDL ratio and LDL to HDL ratio to assess cardiovascular ris

Date & Time

Time Duration Calculator

Calculate the total duration between two times in hours, minutes, and seconds. Supports ov

Finance

Calorie Burned Calculator

Estimate calories burned during various exercises based on your weight, activity, and dura

Physics

Force Calculator

Enter mass (kg) and acceleration (m/s²) to calculate the force in Newtons (N) based on New

Chemistry

Molarity Dilution Calculator

Calculate the volume or concentration needed to dilute a stock solution using C1V1 = C2V2.

Chemistry

pH Calculator

Calculate the pH of a solution using the H⁺ ion concentration. Enter the concentration in

Business

Employee Turnover Rate Calculator

Calculate employee turnover rate for a period based on the number of separations and the a

Marine

Rolling Period Calculator

Calculate rolling period and metacentric height (GM) to assess vessel stability, with a qu

Math

Accounts Receivable Turnover Calculator

Calculate accounts receivable turnover ratio and average collection period to assess busin

Physics

Newton Second Law Calculator

Calculate force, mass or acceleration using Newton's Second Law (F = ma). Solve for any mi

Construction

Concrete Mix Calculator

Calculate the ratio of cement, sand and gravel needed for different concrete mix grades an

Finance

Hydration Tracker Calculator

Track your daily water intake and see how close you are to your hydration goal in real tim

Math

Map Scale Calculator

Convert between map distances and real-world distances using any map scale ratio.

Marine

Fresh Water Allowance Calculator

Professional multi-tab calculator for FWA, DWA, Draft Change, New Draft, Cargo Loading, an

Marine

Anchor Scope and Chain Length Calculator

Find how much anchor chain to pay out when anchoring, based on water depth, bow height, an

Marine

True Wind Calculator

Convert a ship apparent wind reading into true wind speed and direction, useful for weathe

Marine

Wheel Over Point Calculator

Calculate the precise wheel over point for vessel course alterations, using turn radius or