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

US-EPA Air Quality Index from PM₂.₅ Calculator

Compute the US-EPA Air Quality Index (AQI) from a 24-hour average PM₂.₅ concentration in µg/m³. Uses the official piecew...

basic

19,836 4.5 1 min

Sports

Beep Test (Pacer) VO₂max from Level and Shuttle Number Calculator

Estimates VO₂max from the 20m multistage fitness (beep) test level and shuttle reached: VO₂max ≈ level × 1.73 + shuttle...

basic

3,822 4.0 1 min

Physics

RC Circuit Time Constant Calculator

Calculates the RC time constant and the capacitor voltage/charge at any elapsed time during charging or discharging.

basic

13,013 4.9 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

20,552 4.6 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

14,083 4.7 1 min

Everyday Life

Sod Pallet Calculator

Compute the number of sod rolls and full pallets needed to cover a lawn of given square footage, including a 5% waste bu...

basic

20,839 4.3 1 min

Food / Party Planning

Beer Keg Servings Calculator

Compute how many servings you can pour from a beer keg of the given size, given your pour size in ounces. Common keg siz...

basic

14,769 4.5 1 min

Ecology / Carbon Footprint

Meat Consumption Emissions Calculator

Estimate the annual CO₂ equivalent emissions from your dietary meat consumption, given a weekly serving size in kilogram...

basic

17,451 5.0 1 min

Statistics

Confidence Interval for Proportion Calculator

Calculates the confidence interval for a population proportion from sample proportion, sample size, and chosen confidenc...

basic

15,758 4.4 1 min

Sports

Weightlifting Percentage Calculator

Compute the working weight for a given percentage of your one-rep max (1RM), plus a quick reps-to-percent table for comm...

basic

5,889 4.0 1 min

Physics

Wheatstone Bridge Balance & Unknown Resistance

Calculates the unknown resistance Rx in a balanced Wheatstone bridge from the three known resistors.

basic

23,492 3.9 1 min

Everyday Life / Travel

Fuel Cost Calculator

Estimate trip fuel cost from distance, fuel economy, and price per unit.

basic

20,058 4.1 1 min

Showing 13 to 24 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

US-EPA Air Quality Index from PM₂.₅ Calculator

Beep Test (Pacer) VO₂max from Level and Shuttle Number Calculator

RC Circuit Time Constant Calculator

Crushed Stone Tonnage Calculator

Body Fat Percentage from Skinfold Measurements Calculator

Sod Pallet Calculator

Beer Keg Servings Calculator

Meat Consumption Emissions Calculator

Confidence Interval for Proportion Calculator

Weightlifting Percentage Calculator

Wheatstone Bridge Balance & Unknown Resistance

Fuel Cost Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost