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

Attic Ventilation Area Calculator

Compute the required net free vent area (NFA) for an attic using either the 1-to-150 ratio (no vapor barrier) or the 1-t...

basic

6,765 4.2 1 min

Everyday Life

Currency Exchange with Fee Calculator

Converts an amount at a given exchange rate, subtracts a percentage fee, and shows the received amount, fee paid, and ef...

basic

332 4.9 1 min

Everyday Life

Soffit & Ridge Vent Balance Calculator

Split the required attic ventilation area 50/50 between intake (soffit) and exhaust (ridge) and convert each half to lin...

basic

4,399 4.3 1 min

Physics / Mechanics

Simple Pendulum Period & Length Calculator

Calculates the period (or length) of a simple pendulum from its length and local gravitational acceleration.

basic

2,798 5.0 1 min

Physics

Conveyor Belt Motor Torque & Drive Calculator

Calculates conveyor belt drive power from belt tension, belt speed, and system efficiency.

basic

2,243 3.9 1 min

Sports

Cycling Watts to Speed Estimate Calculator

Estimates cycling speed on flat ground from rider power output, total mass, rolling resistance, and aerodynamic drag are...

basic

4,291 4.1 1 min

Everyday Life

Pizza Area & Price-per-Square-Inch Calculator

Compare two pizzas by their slice area and price-per-square-inch. Lets you decide whether the larger pie is actually the...

basic

16,092 4.6 1 min

Everyday Life

Paver Quantity Calculator

Compute the number of pavers needed to cover a rectangular patio or walkway from the area to be paved and the dimensions...

basic

22,320 4.1 1 min

Everyday Life

Clothes Dryer Energy Cost per Load Calculator

Calculates the electricity cost of one clothes dryer cycle from dryer wattage, drying time, and your local electricity r...

basic

1,628 4.0 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

8,461 4.5 1 min

Everyday Life

Plant Watering Frequency by Pot Size Calculator

Estimate days between watering for a potted houseplant from the pot diameter (larger pots dry out more slowly) and the s...

basic

12,226 4.8 1 min

Sports

Cricket Bowling Economy and Average Calculator

Compute a bowler's economy rate (runs conceded per over) and bowling average (runs per wicket taken) from overs bowled,...

basic

22,030 3.9 1 min

Showing 205 to 216 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

Attic Ventilation Area Calculator

Currency Exchange with Fee Calculator

Soffit & Ridge Vent Balance Calculator

Simple Pendulum Period & Length Calculator

Conveyor Belt Motor Torque & Drive Calculator

Cycling Watts to Speed Estimate Calculator

Pizza Area & Price-per-Square-Inch Calculator

Paver Quantity Calculator

Clothes Dryer Energy Cost per Load Calculator

Karvonen Heart Rate Zone Calculator

Plant Watering Frequency by Pot Size Calculator

Cricket Bowling Economy and Average Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost