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

Health

AIMS65 Score for Upper-GI-Bleed In-Hospital Mortality Calculator

Compute the AIMS65 score for upper-GI-bleed in-hospital mortality. 1 point each for: Albumin < 3.0 g/dL; INR > 1.5; alte...

basic

6,568 4.0 1 min

Everyday Life

Compost Greens-and-Browns C:N Ratio Calculator

Compute the C:N ratio of a compost pile from the masses of brown carbon-rich material (CN ≈ 50:1 for dried leaves, straw...

basic

12,554 4.3 1 min

Construction / Materials

Asphalt Calculator

Estimate the tonnes of hot-mix asphalt needed to pave a rectangular area to a chosen thickness.

basic

22,117 4.5 1 min

Food / Cooking

Brine Ratio Calculator

Compute the mass of salt needed to make a brine of a given percentage strength (by weight) for a target water volume — u...

basic

9,372 3.9 1 min

Construction / Materials

Gutter Length Calculator

Estimate the linear metres of gutter and number of downspouts needed for a rectangular roof from its dimensions.

basic

14,312 4.0 1 min

Finance

Home Affordability from Income and Expenses Calculator

Estimates the maximum home price based on: monthly income × 28% (PITI limit) → maximum monthly payment → maximum mortgag...

basic

14,213 4.1 1 min

Physics

Coulomb's Law Electrostatic Force Between Two Charges Calculator

Calculates the electrostatic force between two point charges using Coulomb's law: F = k·|q₁·q₂|/r², where k = 8.9875×10⁹...

basic

10,150 4.7 1 min

Health

Wells DVT Clinical Prediction Rule Calculator

Calculates the Wells DVT score to stratify pretest probability of deep vein thrombosis and guide D-dimer testing or ultr...

basic

8,277 4.8 1 min

Physics

Grey Body Emissivity Radiation Heat Transfer Calculator

Calculates thermal radiation power emitted by a grey body surface from its emissivity, area, and absolute temperature us...

basic

21,174 4.4 1 min

Math

Cross Product Magnitude and Direction from Two Vectors Calculator

Calculates the cross product (scalar magnitude for 2-D vectors) and the angle between two 2-D vectors. The parallelogram...

basic

1,126 4.5 1 min

Everyday Life

Snow Shoveling Time Calculator

Estimate the time to shovel a driveway from its area and snow depth, given a typical clearance rate (≈ 25 sq ft of light...

basic

15,273 4.1 1 min

Statistics

Geometric Distribution First-Success Trial Calculator

Calculates the probability of achieving the first success on exactly the k-th trial in a geometric distribution, plus me...

basic

21,788 4.7 1 min

Showing 229 to 240 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

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Browse categories

Marcus Laurent

AIMS65 Score for Upper-GI-Bleed In-Hospital Mortality Calculator

Compost Greens-and-Browns C:N Ratio Calculator

Asphalt Calculator

Brine Ratio Calculator

Gutter Length Calculator

Home Affordability from Income and Expenses Calculator

Coulomb's Law Electrostatic Force Between Two Charges Calculator

Wells DVT Clinical Prediction Rule Calculator

Grey Body Emissivity Radiation Heat Transfer Calculator

Cross Product Magnitude and Direction from Two Vectors Calculator

Snow Shoveling Time Calculator

Geometric Distribution First-Success Trial Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost