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

Oven Temperature Converter: °C, °F, and Gas Mark

Converts oven temperatures between Celsius, Fahrenheit (F = C×9/5 + 32), and UK Gas Mark (Gas Mark = (C − 121)/14). Hand...

basic

6,423 5.0 1 min

Physics

Blackbody Radiant Intensity at a Given Wavelength Calculator

Calculates the Planck spectral radiance B(λ,T) = (2hc²/λ⁵) / (exp(hc/λkT) − 1) in W/(m²·sr·m). Uses h = 6.626×10⁻³⁴ J·s,...

basic

25,012 4.8 1 min

Sports / Cycling

Cycling FTP from 20-Minute Test Power Calculator

Estimates FTP from a 20-minute maximal effort test: FTP = 0.95 × avg 20-min power. Also computes training zones based on...

basic

13,120 4.2 1 min

Food / Party Planning

BBQ Meat Portions Calculator

Estimate the pounds of raw meat to buy for a BBQ given the guest count and the cut. Accounts for typical cooking yield (...

basic

24,266 5.0 1 min

Physics

Escape Velocity Calculator

Calculates the escape velocity from a planet or celestial body given its mass and radius.

basic

24,356 4.2 1 min

Sports

Soccer Goals per 90 Minutes Calculator

Compute the standard rate stats used in modern football analytics — goals per 90 minutes, assists per 90, and goals + as...

basic

14,975 4.6 1 min

Construction / Materials

Brick Calculator

Estimate the number of bricks required to build a wall of any height and width, including a 10% wastage allowance.

basic

16,446 4.3 1 min

Sports

Darts Checkout Percentage from Successful and Attempted Doubles Calculator

Compute a darts player's checkout percentage — the proportion of attempted double-finishes that were converted: Checkout...

basic

8,481 3.9 1 min

Everyday Life

Soffit & Ridge Vent Balance Calculator

Split the required attic ventilation area 50/50 between intake (soffit) and exhaust (ridge) and convert each half to lin...

basic

7,589 4.8 1 min

Physics / Mechanics

Impulse-Momentum Theorem Calculator

Calculates impulse, change in momentum, and average force from mass, initial/final velocity, and contact time.

basic

1,940 4.3 1 min

Everyday Life / Travel

Jet Lag Recovery Time Calculator

Estimates jet lag severity and approximate recovery time from time zones crossed and direction of travel (eastward vs we...

basic

12,402 4.9 1 min

Health

ARISCAT Perioperative Pulmonary Risk Score Calculator

Calculates ARISCAT score for postoperative pulmonary complication (PPC) risk from 7 variables: age, SpO₂, respiratory in...

basic

15,099 4.6 1 min

Showing 241 to 252 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

Oven Temperature Converter: °C, °F, and Gas Mark

Blackbody Radiant Intensity at a Given Wavelength Calculator

Cycling FTP from 20-Minute Test Power Calculator

BBQ Meat Portions Calculator

Escape Velocity Calculator

Soccer Goals per 90 Minutes Calculator

Brick Calculator

Darts Checkout Percentage from Successful and Attempted Doubles Calculator

Soffit & Ridge Vent Balance Calculator

Impulse-Momentum Theorem Calculator

Jet Lag Recovery Time Calculator

ARISCAT Perioperative Pulmonary Risk Score Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost