Enter age, gender, weight, height, activity and—if known—body-fat %, then press “Calculate”. The tool returns resting metabolic rate (RMR), total daily energy expenditure (TDEE) and calorie targets. RMR typically makes up 60-75 % of total calories you burn each day (ACSM Position Stand 2016).
Use your age, gender and (optionally) resting pulse to compute five training zones. Pick a formula—220-Age, Tanaka or Gulati—then plug the numbers into $$Target=(HRRcdot%)+RHR$$. Moderate exercise equals 64–76 % of max heart rate (ACSM, 2022).
The calculator multiplies each course’s grade points by its credit hours, adds the results, then divides by total credits to give a 4.00-scale GPA—a method adopted by 93 % of U.S. colleges (NCES, 2022). Use it to see where you stand in seconds.
Enter shape, sizes, units and material; the calculator multiplies volume by density—7.85 g/cm³ for carbon steel (EngineeringToolbox, https://www.engineeringtoolbox.com/metal-density-d_50.html)—then shows weight in kg or lb. All unit changes happen automatically. Result: instant, accurate steel mass for planning, buying or lifting.
Find acceleration fast: choose a formula, enter velocity, time or distance, press calculate. The tool applies standard kinematic equations and shows results in m/s²—helpful in class, labs or design work. Earth’s average gravitational acceleration is 9.80665 m/s² (CODATA 2018).
Net income is the money you keep after subtracting all deductions and taxes from your total income; the average U.S. filer pays an effective 13.6 % tax rate (IRS Statistics of Income, 2023).
Gross margin shows what share of each sales dollar you keep after direct costs—U.S. retailers average 23.5% (Damodaran, 2023). This calculator subtracts COGS and optional direct expenses from revenue, then divides the result by revenue to reveal both gross profit and gross-margin %. Just enter your numbers and read the instant verdict.
Use our Density Calculator by entering mass and volume, then press “Calculate”. Example: 1.2 kg and 800 mL returns 1 500 kg/m³. Water’s reference density is 997 kg/m³ at 25 °C (NIST, 2023).
Enter any two of voltage, current, or resistance and the calculator returns power in watts. U.S. homes supply 120 V ± 5 % as standard (NEC 2023, https://www.nfpa.org/), so a 2 A device draws ≈ 240 W.
