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

11,271 4.8 1 min

Sports

Tennis Service Game Hold Probability Calculator

Given the server's per-point win probability p, compute the probability of holding the game (closed form): G(p) = p⁴(15...

basic

9,480 4.9 1 min

Finance / Investing

Venture IRR Target and Dilution Calculator

Calculates the required investment multiple to hit a target IRR over a given horizon and estimates post-dilution ownersh...

basic

14,527 4.9 1 min

Construction / Materials

Mulch Calculator

Estimate how many cubic yards (or cubic feet) of mulch you need to cover a garden bed of any size to a chosen depth.

basic

4,597 4.1 1 min

Fitness / Strength

One Rep Max Calculator

Estimate one-rep max from weight lifted and reps using the Epley formula.

basic

4,398 4.5 1 min

Statistics

F-Test Variance Ratio ANOVA Calculator

Calculates the F-statistic for comparing two sample variances (F-test for equality of variances) from sample standard de...

basic

10,234 4.8 1 min

Everyday Life

Straight-Line Car Depreciation Per Year Calculator

Compute the straight-line annual depreciation of a vehicle: (purchase price − residual value) / useful life in years. Re...

basic

13,121 4.2 1 min

Everyday Life

Bathroom Vent-Fan CFM by Area Calculator

Size a bathroom exhaust fan in CFM using the Home Ventilating Institute target of 8 air changes per hour: CFM = area_sq_...

basic

13,417 4.4 1 min

Finance / Investing

CAGR Compound Annual Growth Rate Calculator

Calculates compound annual growth rate (CAGR) from starting value, ending value, and number of years.

basic

13,132 4.8 1 min

Physics / Mechanics

Hooke's Law Spring Force and Elastic Potential Energy Calculator

Calculates spring restoring force F = kx, elastic potential energy PE = ½kx², and oscillation period T = 2π√(m/k) for a...

basic

2,982 4.3 1 min

Everyday Life

Pool Pump Runtime by Volume Calculator

Compute the daily pool pump runtime needed to achieve a target number of complete water turnovers, from the pool volume...

basic

7,413 4.6 1 min

Sports

Karvonen Heart Rate Zone Calculator

Compute target training heart rate using the Karvonen formula: target = (HRmax − HRrest) · intensity + HRrest. Reports z...

basic

23,881 4.3 1 min

Showing 157 to 168 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

Propane Grill Fuel Duration Calculator

Tennis Service Game Hold Probability Calculator

Venture IRR Target and Dilution Calculator

Mulch Calculator

One Rep Max Calculator

F-Test Variance Ratio ANOVA Calculator

Straight-Line Car Depreciation Per Year Calculator

Bathroom Vent-Fan CFM by Area Calculator

CAGR Compound Annual Growth Rate Calculator

Hooke's Law Spring Force and Elastic Potential Energy Calculator

Pool Pump Runtime by Volume Calculator

Karvonen Heart Rate Zone Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost