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

Hamilton Anxiety Rating Scale (HAM-A) Calculator

Calculates the HAM-A total from 14 symptom groups (anxious mood, tension, fears, insomnia, concentration, depressed mood...

basic

18,478 4.8 1 min

Finance

EBITDA from Operating Income and Depreciation & Amortisation Calculator

Compute EBITDA (Earnings Before Interest, Taxes, Depreciation & Amortisation) from operating income (EBIT) and the D&A c...

basic

12,380 4.9 1 min

Everyday Life

Swimming Pool Fill Time Calculator

Estimate how long it will take to fill a swimming pool from a garden hose, given the pool volume in gallons and the hose...

basic

15,195 5.0 1 min

Everyday Life

Crushed Stone Tonnage Calculator

Compute the tons of crushed stone (or driveway gravel) needed to cover an area at a target depth, using a typical densit...

basic

2,706 4.2 1 min

Finance

Break-Even Units & Revenue Calculator

Calculates break-even point in units and revenue from fixed costs, selling price per unit, and variable cost per unit.

basic

19,033 4.3 1 min

Everyday Life

Plant Spacing and Quantity Calculator

Compute the number of plants that fit in a rectangular bed at a given on-centre spacing. Square grid: rows = floor(width...

basic

4,374 4.5 1 min

Sports

Baseball Runs Created Bill James Formula Calculator

Calculates Bill James's basic Runs Created (RC) statistic, which estimates the number of runs a batter contributes. Usef...

basic

24,124 4.0 1 min

Everyday Life

Extension Cord Gauge Calculator

Compute the voltage drop and percentage drop on a copper extension cord given AWG, one-way length, and current draw. Dro...

basic

18,845 4.9 1 min

Everyday Life

Concrete Bags Needed Calculator

Compute how many bags of pre-mixed concrete are needed to fill a slab, footing, or column of given length, width, and de...

basic

14,521 3.8 1 min

Everyday Life

Greywater Reuse Water Bill Savings Calculator

Estimates annual water bill savings from a greywater reuse system by multiplying daily greywater volume, water cost, and...

basic

14,161 4.9 1 min

Statistics

F-Test Variance Ratio ANOVA Calculator

Calculates the F-statistic for comparing two sample variances (F-test for equality of variances) from sample standard de...

basic

4,180 4.6 1 min

Sports

Tennis First-Serve Percentage from Serves-In and Serves-Out Calculator

Compute a tennis player's first-serve percentage from a match's serve summary: First-serve % = (first serves in) / (tota...

basic

17,081 4.9 1 min

Showing 313 to 324 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

Hamilton Anxiety Rating Scale (HAM-A) Calculator

EBITDA from Operating Income and Depreciation & Amortisation Calculator

Swimming Pool Fill Time Calculator

Crushed Stone Tonnage Calculator

Break-Even Units & Revenue Calculator

Plant Spacing and Quantity Calculator

Baseball Runs Created Bill James Formula Calculator

Extension Cord Gauge Calculator

Concrete Bags Needed Calculator

Greywater Reuse Water Bill Savings Calculator

F-Test Variance Ratio ANOVA Calculator

Tennis First-Serve Percentage from Serves-In and Serves-Out Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost