Calculators— Guides & Articles

• How to Convert an Angle to Radians: Formula and Method

  Published 2026-07-31

  Convert an angle to radians using π/180. Includes the formula, a worked example, and a free browser-based converter for degrees, gradians, turns and more.

  

• Absolute Value Calculator Alternative: Find |x| Fast

  Published 2026-07-31

  Looking for an absolute value calculator alternative? Get |x| for any number — negative, decimal, or scientific notation — instantly in your browser.

  

• 24 Game Solver: Why Four Numbers Are Required, Not Three

  Published 2026-07-31

  24 Game Solver explains why the standard 24 Game uses four numbers, not three, and how to enter four numbers and read the returned expressions.

  

• How to Calculate Calorie Intake: BMR, TDEE & Target

  Published 2026-07-30

  Find your daily calorie intake using the Mifflin-St Jeor TDEE formula. See how BMR, activity level, and weight goal become one clear target you can eat to.

  

• Business Days from a Date in Excel: Formula & Calculator

  Published 2026-07-30

  Count business days from a date in Excel using NETWORKDAYS, then verify the result with a free weekend-skipping calculator that accepts optional holidays.

  

• How to Determine Brinell Hardness Number Step by Step

  Published 2026-07-30

  Determine the Brinell hardness number from your test load, ball diameter and indent diameter using the ASTM E10 formula or the free Brinell calculator.

  

• How to Calculate Bra Size and Cup Step by Step

  Published 2026-07-30

  Calculate bra size and cup from your underbust and bust measurements. See the band and cup formula, US/UK/EU differences, and get your size instantly.

  

• How to Calculate BMR and TDEE Step by Step

  Published 2026-07-29

  BMR is your resting calorie burn; TDEE adds activity. See how to calculate both from age, sex, weight, and height using two proven equations side by side.

  

• How to Calculate BMI for Women: Formula & Ranges

  Published 2026-07-29

  BMI for women uses the same kg/m² formula as anyone else. Get the steps, WHO category cut-offs, and the limits of BMI for female bodies.

  

• 1D Bin Packing Calculator: Pack Sizes into Bins

  Published 2026-07-29

  A 1D bin packing calculator assigns item sizes to equal-capacity bins using First Fit Decreasing, reporting bin count, utilization, and the lower bound.