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

Sports

Bowling Handicap from Average Calculator

Compute a tenpin bowler's handicap from their league average: handicap = round(max(0, base − avg) × percentage). The mos...

basic

7,264 5.0 1 min

Physics

Wave Speed Frequency and Wavelength Calculator

Calculates wave speed, frequency, or wavelength from the other two using the fundamental wave equation v = fλ. Works for...

basic

1,176 4.5 1 min

Everyday Life

Roof Shingles Bundles from Square Footage Calculator

Compute the number of asphalt-shingle bundles needed to cover a given roof area, including a default 10-15 % waste facto...

basic

24,775 3.9 1 min

Health

Kidney GFR Creatinine Clearance Calculator

Estimates creatinine clearance (CrCl) using the Cockcroft-Gault formula to assess kidney function for drug dosing adjust...

basic

24,050 4.3 1 min

Everyday Life

Recipe Cost Per Serving Calculator

Compute the per-serving cost of a recipe by summing the cost of up to five ingredients and dividing by the number of ser...

basic

4,054 4.7 1 min

Sports

VO₂max from Rockport One-Mile Walk Test Calculator

Estimate VO₂max (mL/kg/min) from the Rockport one-mile walk test using Kline et al.'s regression: VO₂max = 132.853 − 0.0...

basic

21,860 4.9 1 min

Physics

Sound Intensity Level Decibel Calculator

Converts between sound intensity (W/m²) and intensity level in decibels (dB). Reference intensity I₀ = 10⁻¹² W/m² (thres...

basic

23,527 4.8 1 min

Physics

Arc Weld Heat Input per mm Calculator

Calculates weld heat input in kJ/mm from welding voltage, current, travel speed, and arc efficiency for standard arc wel...

basic

23,005 3.9 1 min

Everyday Life

Stair Stringer Calculator

Compute the number of steps, individual riser height, individual tread depth, and the diagonal stringer length for a sta...

basic

21,861 4.2 1 min

Everyday Life / Tips

Tip Calculator

Calculate tips and split bills across any number of people.

Featured Trending basic

16,231 4.5 1 min

Sports

Tenpin Bowling Average Calculator

Compute a bowler's average pinfall: average = total_pins / games. Reports the per-game average and the simulated 200-bas...

basic

22,142 4.1 1 min

Sports

Cycling VAM Vertical Ascent in Metres-per-Hour Calculator

Compute a cyclist's VAM (Velocità Ascensionale Media) — vertical ascent in metres per hour: VAM = elevation_gain_m · 360...

basic

21,841 4.1 1 min

Showing 253 to 264 of 359 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

Mar 10, 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 30, 2026 3 min

Calcify

Browse categories

Marcus Laurent

Bowling Handicap from Average Calculator

Wave Speed Frequency and Wavelength Calculator

Roof Shingles Bundles from Square Footage Calculator

Kidney GFR Creatinine Clearance Calculator

Recipe Cost Per Serving Calculator

VO₂max from Rockport One-Mile Walk Test Calculator

Sound Intensity Level Decibel Calculator

Arc Weld Heat Input per mm Calculator

Stair Stringer Calculator

Tip Calculator

Tenpin Bowling Average Calculator

Cycling VAM Vertical Ascent in Metres-per-Hour Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost