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

SOFA Sepsis-Organ Failure Assessment Score Calculator

Calculates the Sequential Organ Failure Assessment (SOFA) score from respiratory, coagulation, liver, cardiovascular, ne...

basic

11,574 4.7 1 min

Everyday Life

Rainwater Barrel Fill Time from Roof Area Calculator

Estimate how long it takes to fill a rainwater collection barrel from a sloped roof at a given rainfall rate. 1 inch of...

basic

15,619 4.9 1 min

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

22,236 4.9 1 min

Everyday Life

Screen Time Budget from Daily Schedule Calculator

Calculates the daily screen time budget remaining after accounting for work/school hours and outdoor/physical activities...

basic

16,048 4.1 1 min

Finance

Debt Service Coverage Ratio (DSCR) from NOI Calculator

Calculates DSCR = Net Operating Income / Annual Debt Service. A DSCR > 1 means the property or business generates enough...

basic

23,086 4.1 1 min

Sports

Cricket Batting Average and Strike Rate Calculator

Compute a cricketer's batting average and strike rate from runs scored, balls faced, innings played and times dismissed...

basic

9,511 4.6 1 min

Everyday Life

U-Value Window Heat Loss Calculator

Compute the heat-loss rate through a window from its U-value (BTU/h/ft²/°F), area, and inside-to-outside temperature dif...

basic

18,862 4.0 1 min

Sports

Swim Distance per Stroke (DPS) Calculator

Compute your distance-per-stroke (DPS) and stroke rate from the pool length, the number of strokes you take per length,...

basic

8,409 4.8 1 min

Sports

One-Rep Max Epley Formula Calculator

Estimates one-repetition maximum (1RM) from submaximal weight and reps completed using the Epley formula.

basic

15,739 4.8 1 min

Sports / Running

Running Age-Grade Performance Factor Calculator

Calculates running age-grade performance percentage to compare times fairly across age groups using WMA age-grading fact...

basic

13,503 3.8 1 min

Sports

Running Cadence Calculator

Compute your running speed and pace per kilometre / mile from your cadence (steps per minute) and stride length.

basic

2,958 4.9 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

7,047 4.4 1 min

Showing 289 to 300 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

SOFA Sepsis-Organ Failure Assessment Score Calculator

Rainwater Barrel Fill Time from Roof Area Calculator

US-EPA Air Quality Index from PM₂.₅ Calculator

Screen Time Budget from Daily Schedule Calculator

Debt Service Coverage Ratio (DSCR) from NOI Calculator

Cricket Batting Average and Strike Rate Calculator

U-Value Window Heat Loss Calculator

Swim Distance per Stroke (DPS) Calculator

One-Rep Max Epley Formula Calculator

Running Age-Grade Performance Factor Calculator

Running Cadence Calculator

Weightlifting Percentage Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost