BEng Civil Engineering; 8 years in project management.

Marcus Laurent

Contributor, Construction & Everyday Life

0 calculators 0 articles Member since Jun 2026

About

Marcus focuses on the "practical math" calculators: home projects, construction, fuel, and travel. His goal is simple — give the reader a number they can actually use on site or on the road in under 30 seconds.

Before writing full-time, he spent eight years in infrastructure and residential construction project management.

Areas of expertise

Construction math Home projects Travel planning Fuel economy

Education & credentials

BEng Civil Engineering — Polytechnique Montréal

Physics

Pipe Wall Thickness from Pressure and Material Calculator

Calculates minimum pipe wall thickness using the ASME Barlow / B31 formula from design pressure, pipe outer diameter, al...

basic

9,947 5.0 1 min

Sports

Cycling Calorie Burn Calculator

Estimate calories burned cycling from a chosen MET (metabolic equivalent) value for the intensity, your weight, and the...

basic

8,696 4.4 1 min

Math / Percentage

Law of Cosines: Unknown Side or Angle Calculator

Applies the law of cosines c² = a² + b² − 2ab·cos C to find an unknown side or angle in any triangle. Also computes the...

basic

5,334 4.8 1 min

Everyday Life

Air-Conditioner BTU Sizing from Room Size Calculator

Estimate the cooling capacity (BTU/h) needed for a room from its area, ceiling height (relative to 8 ft baseline) and nu...

basic

15,849 4.7 1 min

Everyday Life

Roofing Nail Quantity Calculator

Compute the number of roofing nails needed for an asphalt-shingle roof, given the roof area in squares (1 square = 100 f...

basic

21,331 4.3 1 min

Finance / Budgeting

Household Grocery Budget Calculator

Estimate monthly grocery spending from the number of adults, children, and a chosen USDA-style food-plan band (thrifty,...

basic

23,872 4.5 1 min

Everyday Life

Mortgage Discount Points Break-Even Calculator

Calculates how many months it takes to break even on mortgage discount points by comparing upfront cost against the mont...

basic

2,806 4.7 1 min

Everyday Life

Tile Floor Coverage with Waste Calculator

Compute the number of square tiles needed to cover a floor, including a waste allowance for cuts and breakage. tiles = c...

basic

14,675 4.4 1 min

Everyday Life

Propane Tank Refill Cost Calculator

Compute the cost to refill a propane tank from its current level to a target fill level (typically 80 % for safety), giv...

basic

23,490 4.0 1 min

Everyday Life

Household Water Usage from Fixtures Calculator

Estimate a household's daily water usage in gallons from typical fixture flow rates and use frequencies: toilets (1.6 ga...

basic

17,763 4.8 1 min

Sports

Hockey Save Percentage and GAA Calculator

Compute a goaltender's save percentage and goals-against average from saves, goals allowed and minutes played. SV% = sav...

basic

17,366 4.5 1 min

Sports

Tennis Serve Speed (mph) from Distance and Time Calculator

Compute the speed of a tennis serve from the (foot-traced) distance the ball travels between leaving the racquet and cro...

basic

337 4.3 1 min

Showing 361 to 372 of 386 results

guide Conversions

Unit Conversion Without Typos: A Field Guide

Most unit-conversion mistakes are dumb mistakes — swapped factors, dropped decimals, wrong direction. A short guide to not making them.

Marcus Laurent

May 14, 2026 3 min

tutorial Fitness

Running Pace: How to Read Splits Without Getting Lost

Pace, splits, and goal times talk about the same thing from three different angles. A short guide to keeping them straight mid-race.

Marcus Laurent

Jan 24, 2026 3 min

Best Free Calculator

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Marcus Laurent

Pipe Wall Thickness from Pressure and Material Calculator

Cycling Calorie Burn Calculator

Law of Cosines: Unknown Side or Angle Calculator

Air-Conditioner BTU Sizing from Room Size Calculator

Roofing Nail Quantity Calculator

Household Grocery Budget Calculator

Mortgage Discount Points Break-Even Calculator

Tile Floor Coverage with Waste Calculator

Propane Tank Refill Cost Calculator

Household Water Usage from Fixtures Calculator

Hockey Save Percentage and GAA Calculator

Tennis Serve Speed (mph) from Distance and Time Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost