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

Sports

Cricket Net Run Rate (NRR) from Runs and Overs Calculator

Compute a team's net run rate over a tournament, the most common ICC tiebreaker for league-stage standings. NRR = (Total...

basic

2,305 4.4 1 min

Everyday Life

Paint Mix Ratio Calculator

Compute the volume of each component (base, hardener, reducer) required to mix a target total volume of paint at a given...

basic

17,030 4.8 1 min

Everyday Life

Ceiling Joist Count Calculator

Compute the number of ceiling joists required to span a rectangular ceiling, given the span direction (joists run perpen...

basic

23,647 3.9 1 min

Everyday Life

Laundry Detergent Dosage Calculator

Compute the appropriate amount of liquid laundry detergent per load (in fluid ounces and tablespoons) based on load size...

basic

5,577 4.3 1 min

Physics

Heisenberg Uncertainty Δx·Δp ≥ ℏ/2 Calculator

Calculates the minimum uncertainty in momentum (or position) given the uncertainty in position (or momentum) using Heise...

basic

19,709 4.3 1 min

Everyday Life / Travel

Marathon Half Marathon Pace Converter Calculator

Converts marathon pace to estimated half-marathon pace and finish time using the common ~4% faster half-marathon pace he...

basic

11,680 5.0 1 min

Sports

Darts Checkout Percentage from Successful and Attempted Doubles Calculator

Compute a darts player's checkout percentage — the proportion of attempted double-finishes that were converted: Checkout...

basic

5,636 4.9 1 min

Sports

Cycling Power Zones (Coggan) Calculator

Generate the seven Coggan power-training zones (Active recovery → Neuromuscular) as percentages of your Functional Thres...

basic

2,302 4.6 1 min

Sports

Boston Marathon Qualifying Pace from Age and Gender Calculator

Look up the official Boston Athletic Association Boston-marathon qualifying time (per current rules) for the runner's ag...

basic

24,902 4.9 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

20,996 4.5 1 min

Everyday Life

Recipe Cost Per Serving Calculator

Compute the per-serving cost of a recipe by summing the cost of up to five ingredients and dividing by the number of ser...

basic

21,585 4.4 1 min

Sports

Cycling FTP from 20-Minute Power Test Calculator

Estimate functional threshold power (FTP) from a single all-out 20-minute time trial: FTP ≈ 0.95 · average_20min_watts....

basic

11,695 3.9 1 min

Showing 37 to 48 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

Cricket Net Run Rate (NRR) from Runs and Overs Calculator

Paint Mix Ratio Calculator

Ceiling Joist Count Calculator

Laundry Detergent Dosage Calculator

Heisenberg Uncertainty Δx·Δp ≥ ℏ/2 Calculator

Marathon Half Marathon Pace Converter Calculator

Darts Checkout Percentage from Successful and Attempted Doubles Calculator

Cycling Power Zones (Coggan) Calculator

Boston Marathon Qualifying Pace from Age and Gender Calculator

Broselow Pediatric Emergency Weight Estimator

Recipe Cost Per Serving Calculator

Cycling FTP from 20-Minute Power Test Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost