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

Propane Grill Fuel Duration Calculator

Compute how many hours a propane tank will run a gas grill, from the tank weight, the grill's rated BTU output, and prop...

basic

17,306 4.1 1 min

Sports

Rep Weight from 1RM Calculator

Compute the working weight at a chosen number of reps from your 1-rep max using a standard percentage table (e.g., 5 rep...

basic

4,928 3.9 1 min

Health

Body Fat Percentage from Skinfold Measurements Calculator

Calculates body fat percentage using the Jackson-Pollock 3-site skinfold method. Male sites: chest, abdomen, thigh. Fema...

basic

7,809 4.9 1 min

Sports

Boxing Punch Kinetic Energy from Mass and Fist Speed Calculator

Compute the peak kinetic energy of a punch: KE = ½ · m_eff · v², where m_eff is the effective striking mass (glove + for...

basic

1,186 4.8 1 min

Everyday Life

Solar Panel Optimal Tilt Angle Calculator

Recommends optimal fixed solar panel tilt angle from site latitude, with winter and summer seasonal tilt adjustments for...

basic

5,625 4.9 1 min

Physics

AC Apparent, Real & Reactive Power Calculator

Calculates apparent power (VA), real power (W), reactive power (VAr), and power factor from voltage, current, and phase...

basic

10,324 4.9 1 min

Physics / Mechanics

Angled Launch: Maximum Range and Apex Calculator

Calculates projectile range R = v₀²·sin(2θ)/g, maximum height H = v₀²·sin²θ/(2g), time of flight T = 2v₀·sin θ/g, and op...

basic

1,499 4.4 1 min

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

21,247 4.8 1 min

Physics

Hydrostatic Pressure at Depth in a Static Fluid Calculator

Compute the absolute pressure at depth h in a static fluid: P = P₀ + ρgh, where P₀ is the surface pressure (default 101...

basic

16,319 4.8 1 min

Everyday Life

Brick Wall Quantity Calculator

Compute the number of standard modular bricks needed for a vertical wall, given wall length and height plus brick face d...

basic

2,878 4.7 1 min

Everyday Life

Carpet & Padding Area Calculator

Compute the carpet (and padding) needed to cover a rectangular room, in square yards, with a chosen waste allowance for...

basic

21,751 4.3 1 min

Food / Party Planning

Wine Bottles per Event Calculator

Compute the number of standard 750 mL wine bottles you should buy for an event, given the guest count, the average glass...

basic

13,821 4.5 1 min

Showing 241 to 252 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

Propane Grill Fuel Duration Calculator

Rep Weight from 1RM Calculator

Body Fat Percentage from Skinfold Measurements Calculator

Boxing Punch Kinetic Energy from Mass and Fist Speed Calculator

Solar Panel Optimal Tilt Angle Calculator

AC Apparent, Real & Reactive Power Calculator

Angled Launch: Maximum Range and Apex Calculator

WPM Reading Time Estimator

Hydrostatic Pressure at Depth in a Static Fluid Calculator

Brick Wall Quantity Calculator

Carpet & Padding Area Calculator

Wine Bottles per Event Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost