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

Yahtzee Large Straight Odds Calculator

Compute the probability of rolling a Yahtzee large straight (1-2-3-4-5 or 2-3-4-5-6) in N attempts of a single full re-r...

basic

1,671 4.7 1 min

Construction / Materials

Drywall Calculator

Estimate drywall sheets, screws, joint compound, and tape needed for a room of a given size.

basic

4,229 4.8 1 min

Sports / Cycling

Cycling FTP from 20-Minute Test Power Calculator

Estimates FTP from a 20-minute maximal effort test: FTP = 0.95 × avg 20-min power. Also computes training zones based on...

basic

24,361 4.0 1 min

Sports / Cycling

Training Stress Score (TSS) from Power and FTP Calculator

Calculates TSS = (duration_sec × NP × IF) / (FTP × 3600) × 100, where NP is normalised power, IF = NP/FTP, and FTP is fu...

basic

22,610 4.7 1 min

Finance / Investing

Jensen's Alpha from CAPM and Actual Return Calculator

Calculates Jensen's alpha = R_portfolio − [R_f + β(R_m − R_f)]. Positive alpha indicates outperformance beyond what CAPM...

basic

23,232 4.5 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

12,030 4.1 1 min

Everyday Life

Trailer Tongue-Weight from Trailer Weight (10-15% Rule) Calculator

Compute the recommended tongue weight (downward force on the hitch ball) for a conventional ball-coupler trailer: 10-15...

basic

1,737 4.8 1 min

Everyday Life

Duct CFM Sizing from Room Area Calculator

Compute the recommended supply-duct airflow (CFM) for a room from its square footage, ceiling height, and target air-cha...

basic

17,321 4.4 1 min

Everyday Life

Gravel Driveway Cubic Yards Calculator

Compute the cubic yards of gravel needed to cover a driveway of given length, width, and depth, with an optional waste/c...

basic

1,009 4.6 1 min

Sports

VO2max from a 1.5-Mile Run Calculator

Estimate maximal aerobic capacity (VO2max in mL·kg⁻¹·min⁻¹) from a 1.5-mile timed-run field test using the Pollock-Wilmo...

basic

24,668 4.3 1 min

Everyday Life

Fence Posts Needed Calculator

Compute the number of fence posts needed for a rectangular yard from the perimeter, the desired post spacing, and the nu...

basic

21,054 4.2 1 min

Everyday Life

Lawn Seed Coverage Calculator

Compute the pounds of grass seed needed for a lawn given the area and the recommended seed-rate (typically 5–10 lb/1000...

basic

14,624 4.9 1 min

Showing 133 to 144 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

Yahtzee Large Straight Odds Calculator

Drywall Calculator

Cycling FTP from 20-Minute Test Power Calculator

Training Stress Score (TSS) from Power and FTP Calculator

Jensen's Alpha from CAPM and Actual Return Calculator

Venture IRR Target and Dilution Calculator

Trailer Tongue-Weight from Trailer Weight (10-15% Rule) Calculator

Duct CFM Sizing from Room Area Calculator

Gravel Driveway Cubic Yards Calculator

VO2max from a 1.5-Mile Run Calculator

Fence Posts Needed Calculator

Lawn Seed Coverage Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost