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

Construction / Rooms

Room Area Calculator

Get the floor area of a rectangular or L-shaped room in any common unit.

basic

2,368 4.3 1 min

Sports

Wilks Powerlifting Strength Score Calculator

Calculates the Wilks score to compare powerlifting totals across different body weights using the standard Wilks coeffic...

basic

10,552 4.7 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

10,369 4.7 1 min

Sports

Basketball True Shooting Percentage Calculator

Compute true shooting percentage — the most accurate single-number measure of scoring efficiency that accounts for 2-poi...

basic

17,198 4.3 1 min

Everyday Life

Hot Tub Fill Time Calculator

Estimate how long it takes to fill a hot tub from a garden hose, given the tub volume and the typical hose flow rate (5-...

basic

5,486 4.6 1 min

Finance

PEG Ratio Growth-Adjusted PE Calculator

Calculates the Price/Earnings-to-Growth (PEG) ratio to assess whether a stock is cheap or expensive relative to its earn...

basic

3,030 4.5 1 min

Statistics / Descriptive

Interquartile Range and Five-Number Summary Calculator

Given Q1, median, Q3, min, and max, calculates IQR = Q3 − Q1, inner fences (Q1 − 1.5×IQR, Q3 + 1.5×IQR) for outlier dete...

basic

14,847 4.5 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

4,431 4.3 1 min

Health

Ottawa Ankle Rules Fracture Risk Calculator

Applies the Ottawa Ankle Rules to determine if an X-ray is needed after ankle injury: pain in malleolar zone + bone tend...

basic

9,269 4.0 1 min

Everyday Life

Grass Seed Quantity for Lawn Calculator

Compute the pounds of grass seed needed to seed (new) or overseed (existing) a lawn from the total area and the recommen...

basic

1,557 4.1 1 min

Physics

Darcy-Weisbach Friction Head Loss Calculator

Calculates friction head loss in a pipe from Darcy friction factor, pipe length, diameter, and flow velocity.

basic

22,122 4.8 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

17,132 4.8 1 min

Showing 337 to 348 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

Browse categories

Marcus Laurent

Room Area Calculator

Wilks Powerlifting Strength Score Calculator

Cross Product Magnitude and Direction from Two Vectors Calculator

Basketball True Shooting Percentage Calculator

Hot Tub Fill Time Calculator

PEG Ratio Growth-Adjusted PE Calculator

Interquartile Range and Five-Number Summary Calculator

Two-Sample Z-Test Statistic Calculator

Ottawa Ankle Rules Fracture Risk Calculator

Grass Seed Quantity for Lawn Calculator

Darcy-Weisbach Friction Head Loss Calculator

Gutter Length Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost