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

Finance

Net Present Value of a Growing Annuity Calculator

Compute the present value of a growing annuity — a finite stream of cash flows that grow at a constant rate g per period...

basic

22,691 3.9 1 min

Everyday Life

Concrete Blocks Needed for a Wall Calculator

Compute the number of concrete masonry units (CMU blocks) needed to build a wall, including a default 5-10 % waste facto...

basic

16,699 4.9 1 min

Everyday Life

USB File Transfer Time from File Size and Speed Calculator

Estimates transfer time = file size (bits) / transfer speed (bps). Reference speeds: USB 2.0 = 480 Mbit/s, USB 3.0 = 5 G...

basic

19,947 4.7 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

24,606 4.2 1 min

Everyday Life

Gable Roof Surface Area Calculator

Compute the total roof surface area of a simple gable (two-pitch) roof from the ridge length, the horizontal half-span (...

basic

10,323 3.9 1 min

Sports

Chess Position Material Balance Calculator

Compute the material balance of a chess position from the piece counts of both sides, using standard relative values: pa...

basic

2,521 4.1 1 min

Ecology / Transport

Car Trip Emissions Calculator

Estimate the CO₂ equivalent emissions for a single car trip, given the trip distance, the vehicle's fuel consumption, an...

basic

2,913 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

19,522 4.6 1 min

Sports

Cooper 12-Minute Run VO₂max Calculator

Estimate VO₂max in mL/(kg·min) from the distance covered during the Cooper 12-minute run test using the regression VO₂ma...

basic

13,062 5.0 1 min

Math

Linear Diophantine Equation Integer Solution Calculator

Given a particular integer solution (x₀, y₀) and GCD d of a and b, computes the general solution: x = x₀ + (b/d)t, y = y...

basic

11,794 4.8 1 min

Physics

Damped Harmonic Oscillator Amplitude Decay Calculator

Compute the amplitude of a lightly damped harmonic oscillator (e.g. a pendulum in air, an RLC circuit) at time t. Decay...

basic

3,919 4.8 1 min

Everyday Life

Driveway Seal-Coat Gallons Needed Calculator

Compute the gallons of asphalt seal-coat needed to cover a driveway, given the area in square feet, the planned number o...

basic

11,282 4.5 1 min

Showing 61 to 72 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

Net Present Value of a Growing Annuity Calculator

Concrete Blocks Needed for a Wall Calculator

USB File Transfer Time from File Size and Speed Calculator

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

Gable Roof Surface Area Calculator

Chess Position Material Balance Calculator

Car Trip Emissions Calculator

Hooke's Law Spring Force and Elastic Potential Energy Calculator

Cooper 12-Minute Run VO₂max Calculator

Linear Diophantine Equation Integer Solution Calculator

Damped Harmonic Oscillator Amplitude Decay Calculator

Driveway Seal-Coat Gallons Needed Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost