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

Sourdough Starter Feed Ratio Calculator

Compute the grams of flour and water to add to a sourdough starter at a chosen feed ratio (e.g. 1:5:5), which dictates h...

basic

13,442 3.9 1 min

Health

Broselow Pediatric Emergency Weight Estimator

Estimates a child's weight in an emergency from age using standard pediatric formulas (APLS and Luscombe-Owens) when a s...

basic

14,316 4.1 1 min

Statistics / Probability

Law of Total Probability from Conditional Probabilities Calculator

Calculates the total probability of event B using the law of total probability: P(B) = P(B|A₁)·P(A₁) + P(B|A₂)·P(A₂) + P...

basic

7,945 4.9 1 min

Sports

IPF GL Points for Raw Powerlifting Calculator

Compute IPF GL Points — the official cross-bodyweight scoring used by the International Powerlifting Federation (replaci...

basic

7,254 3.9 1 min

Food / Party Planning

Party Food Planning Calculator

Estimate how much food to prepare per major category (appetizers, main, sides, dessert) for a sit-down party, scaling wi...

basic

4,322 3.8 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

12,480 4.0 1 min

Food / Cooking

Cooking Conversion Calculator

Convert cups, tablespoons, teaspoons, and millilitres — with common ingredient-specific gram conversions.

basic

23,518 4.7 1 min

Everyday Life

Retaining Wall Block Calculator

Compute the total number of segmental retaining-wall blocks needed for a given wall length, wall height, and block dimen...

basic

215 5.0 1 min

Everyday Life

HVAC Airflow CFM Calculator

Compute the required HVAC airflow in cubic feet per minute (CFM) for a room from its volume and the target air changes p...

basic

2,256 4.3 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

17,901 4.9 1 min

Finance / Investing

Risk-Adjusted Discount Rate from Beta and Market Premium Calculator

Estimates a risk-adjusted discount rate for a project: RADR = Rf + β_project · (Rm − Rf). Compares to the company WACC t...

basic

15,174 4.0 1 min

Everyday Life

Air-Conditioner BTU Sizing from Room Size Calculator

Estimate the cooling capacity (BTU/h) needed for a room from its area, ceiling height (relative to 8 ft baseline) and nu...

basic

10,918 4.2 1 min

Showing 109 to 120 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

Sourdough Starter Feed Ratio Calculator

Broselow Pediatric Emergency Weight Estimator

Law of Total Probability from Conditional Probabilities Calculator

IPF GL Points for Raw Powerlifting Calculator

Party Food Planning Calculator

Simple Pendulum Period & Length Calculator

Cooking Conversion Calculator

Retaining Wall Block Calculator

HVAC Airflow CFM Calculator

Running Cadence Calculator

Risk-Adjusted Discount Rate from Beta and Market Premium Calculator

Air-Conditioner BTU Sizing from Room Size Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost