Calculators — Guides & Articles

• How to Calculate the Week Number of Any Date in a Year

  Published 2026-10-04

  Calculate the ISO 8601 week number for any Gregorian date. See the formula, the boundary rules, and how the Week Number Calculator handles 53-week years.

  

• How to Convert Any Volume to Gallons (U.S. and Imperial)

  Published 2026-10-04

  Convert any volume to gallons using exact U.S. liquid and imperial factors. Step-by-step method, supported units, and when a calculator beats manual math.

  

• Does a Traveling Salesman Solver Find the Shortest Route?

  Published 2026-10-04

  A traveling salesman solver returns an approximate closed tour, not the globally shortest route. See why nearest neighbor + 2-opt can hit a local minimum.

  

• How to Calculate Triangle Area in Square Meters

  Published 2026-10-04

  Calculate any triangle's area in square meters using base × height ÷ 2. Convert units, avoid common pitfalls, and use a free browser-based tool.

  

• How to Calculate Trapezoidal Footing Cross-Section Area

  Published 2026-10-03

  Calculate trapezoidal footing cross-section area using A = (a + b)h/2. Enter widths and depth in mm, cm, m, km, in, ft, yd, or mi.

  

• Calculate Timesheet in Excel: Hours, Breaks, and Pay

  Published 2026-10-03

  Step-by-step Excel formulas to calculate a timesheet: hours, unpaid breaks, and weekly pay. Plus the common setup mistakes that break your totals.

  

• How to Change Time Zone on iPhone: Settings Steps

  Published 2026-10-03

  Step-by-step guide to changing the time zone on iPhone manually through Settings, plus how to cross-check results with a DST-aware Time Zone Converter.

  

• How to Calculate Time Duration in Maths

  Published 2026-10-03

  Calculate time duration in maths using a clear formula, a worked example, and a free Time Duration Calculator that shows every unit at once.

  

• How to Convert Time to Hours: Formulas and a Free Tool

  Published 2026-10-03

  Convert any time value to hours with simple formulas and a free browser-based tool. Includes minutes, seconds, days, weeks, months, and years.

  

• How to Calculate Tile for Shower Projects

  Published 2026-10-03

  Estimate the number of tiles and boxes needed for a shower remodel. Measure walls and floors, apply waste allowances, and plan accordingly.