Calculators— Guides & Articles

• How to Calculate with a Scientific Calculator

  Published 2026-08-16

  Use a free scientific calculator for trig, logs, exponents, roots, and factorials. Runs in your browser, no signup or install, with a step-by-step guide.

  

• How to Calculate BMR for Females Step by Step

  Published 2026-08-15

  Step-by-step method to calculate BMR for females using Mifflin-St Jeor and the revised Harris-Benedict equation — with formulas and a worked example.

  

• How to Calculate BMI in Pounds and Inches

  Published 2026-08-15

  Find your BMI using pounds and inches. The imperial formula is 703 × lb ÷ in² — get your number and WHO category with our free calculator.

  

• Assignment Problem Solver Online: Hungarian Algorithm

  Published 2026-08-15

  Paste a cost matrix and get the optimal one-worker-per-task pairing with minimum total cost, computed locally via the Hungarian algorithm.

  

• How to Calculate Wallpaper for a Ceiling

  Published 2026-08-15

  Calculate wallpaper for a ceiling using full drops, trim allowance, and vertical pattern repeat. Get the right roll count before ordering.

  

• How to Calculate Optimal Viewing Distance for TV

  Published 2026-08-15

  Compare Samsung, Sony, and Panasonic viewing-distance formulas for any 16:9 TV from 20 to 150 inches. See results in inches, feet, and meters instantly.

  

• Traveling Salesman Problem: A Best-Solution Route Builder

  Published 2026-08-15

  Build an approximate TSP tour from 3–50 coordinates. Compare the initial nearest-neighbor distance with the 2-opt improved route before copying it.

  

• How to Calculate Triangle Area for Concrete Quantity

  Published 2026-08-15

  Calculate triangle area for concrete quantity with base and perpendicular height. The ½bh formula and how to convert area into concrete volume.

  

• How to Calculate an Isosceles Trapezoid Area Step by Step

  Published 2026-08-15

  Use A = (a + b)h/2 with the perpendicular height measured in the same unit as both parallel bases, then read the result in that squared unit and in m².

  

• Calculate Timesheet Hours in Excel: Formulas and a Shortcut

  Published 2026-08-15

  Excel formulas for daily and weekly timesheet hours, break subtraction, and overnight shifts — plus a free browser tool that does it for you.