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

Everyday Life

WPM Reading Time Estimator

Estimates how long it takes to read a book or article from word count and reading speed (words per minute).

basic

1,611 4.0 1 min

Math

Linear Diophantine Equation Integer Solution Calculator

Given a particular integer solution (x₀, y₀) and GCD d of a and b, computes the general solution: x = x₀ + (b/d)t, y = y...

basic

23,654 3.9 1 min

Math / Percentage

Gamma Function via Stirling Approximation Calculator

Approximates the gamma function Γ(z) using Stirling's series for z > 0: Γ(z) ≈ √(2π/z) · (z/e)^z. For integer z, Γ(n) =...

basic

18,773 4.2 1 min

Everyday Life

Ceiling Joist Count Calculator

Compute the number of ceiling joists required to span a rectangular ceiling, given the span direction (joists run perpen...

basic

2,546 4.0 1 min

Everyday Life

ADA Ramp Grade Calculator

Compute the run length and slope percentage of an accessibility ramp from the rise. Reports whether the slope meets ADA'...

basic

20,346 4.4 1 min

Statistics / Descriptive

Two-Sample Z-Test Statistic Calculator

Calculates the z-statistic for comparing two sample means when population variances are known: z = (x̄₁ − x̄₂) / √(σ₁²/n...

basic

1,433 4.1 1 min

Sports

VO2max from a 1.5-Mile Run Calculator

Estimate maximal aerobic capacity (VO2max in mL·kg⁻¹·min⁻¹) from a 1.5-mile timed-run field test using the Pollock-Wilmo...

basic

3,345 4.0 1 min

Sports

Cricket Bowling Economy and Average Calculator

Compute a bowler's economy rate (runs conceded per over) and bowling average (runs per wicket taken) from overs bowled,...

basic

21,108 3.8 1 min

Food / Drinks

Tea Brewing Calculator

Compute the grams of loose-leaf tea and the volume of water needed to brew a target number of 8 oz cups at a chosen stre...

basic

10,100 4.6 1 min

Everyday Life

Wall Paint Area Minus Doors and Windows Calculator

Calculates the net wall area = perimeter × height − (doors + windows area). Then estimates litres needed = net area × co...

basic

9,720 4.6 1 min

Ecology / Carbon Footprint

Tree CO₂ Sequestration Calculator

Estimate the annual CO₂ that a young hardwood tree absorbs from the atmosphere (typically about 22 kg per year over the...

basic

16,943 4.3 1 min

Statistics / Descriptive

Normal Distribution Z-Score and Percentile Calculator

Calculates z-score z = (x − μ)/σ and approximate one-tailed percentile using the rational approximation of the standard...

basic

13,249 5.0 1 min

Showing 37 to 48 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

WPM Reading Time Estimator

Linear Diophantine Equation Integer Solution Calculator

Gamma Function via Stirling Approximation Calculator

Ceiling Joist Count Calculator

ADA Ramp Grade Calculator

Two-Sample Z-Test Statistic Calculator

VO2max from a 1.5-Mile Run Calculator

Cricket Bowling Economy and Average Calculator

Tea Brewing Calculator

Wall Paint Area Minus Doors and Windows Calculator

Tree CO₂ Sequestration Calculator

Normal Distribution Z-Score and Percentile Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost