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

Construction / Rooms

Pool Volume Calculator

Compute the water volume of a rectangular pool from length, width, and average depth, in cubic metres, litres, and US ga...

basic

14,578 4.9 1 min

Statistics

Chi-Square Independence Test Calculator

Calculates the chi-square statistic for a 2×2 contingency table to test for independence between two categorical variabl...

basic

21,935 4.7 1 min

Health

Serum Anion Gap (Metabolic Acidosis) Calculator

Calculates the serum anion gap and applies Winter's correction for albumin. Helps differentiate causes of metabolic acid...

basic

21,767 4.9 1 min

Finance

Break-Even Rental Price for Landlord Calculator

Calculates the minimum monthly rent a landlord must charge to cover mortgage payment and expenses, accounting for expect...

basic

11,923 4.3 1 min

Statistics / Descriptive

Normal Distribution Z-Score and Percentile Calculator

Calculates z-score z = (x − μ)/σ and approximate one-tailed percentile using the rational approximation of the standard...

basic

18,466 4.6 1 min

Sports

Item Drop Grind Runs Calculator

Compute the number of runs needed in a video-game farming loop to reach a target probability of seeing at least one drop...

basic

23,159 4.0 1 min

Everyday Life / Travel

EV Efficiency in Miles per kWh Calculator

Compute an electric vehicle's energy efficiency from total miles driven and total kWh consumed (from charging records or...

basic

5,871 4.4 1 min

Statistics / Descriptive

Coefficient of Variation (CV) Dispersion Calculator

Calculates the coefficient of variation (CV) as a percentage to compare variability between datasets with different mean...

basic

23,866 4.7 1 min

Everyday Life

Closet Rod Clothing Capacity Calculator

Estimate how many garments your closet rod can hold based on its length and the average inches needed per garment (1 in...

basic

11,959 4.0 1 min

Health

HbA1c to Average Glucose Calculator

Converts HbA1c percentage to estimated average glucose (eAG) in mg/dL and mmol/L using the ADAG study formula.

basic

13,235 4.8 1 min

Sports

Tenpin Bowling Average Calculator

Compute a bowler's average pinfall: average = total_pins / games. Reports the per-game average and the simulated 200-bas...

basic

23,420 3.9 1 min

Sports

NFL Passer Rating Calculator

Compute the standard NFL passer rating (0–158.3) from completions, attempts, yards, touchdowns, and interceptions, using...

basic

19,094 3.8 1 min

Showing 157 to 168 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

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Marcus Laurent

Pool Volume Calculator

Chi-Square Independence Test Calculator

Serum Anion Gap (Metabolic Acidosis) Calculator

Break-Even Rental Price for Landlord Calculator

Normal Distribution Z-Score and Percentile Calculator

Item Drop Grind Runs Calculator

EV Efficiency in Miles per kWh Calculator

Coefficient of Variation (CV) Dispersion Calculator

Closet Rod Clothing Capacity Calculator

HbA1c to Average Glucose Calculator

Tenpin Bowling Average Calculator

NFL Passer Rating Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost