BEng Civil Engineering; 8 years in project management.

Marcus Laurent

Contributor, Construction & Everyday Life

0 calculators 0 articles Member since Jun 2026

About the author

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

Food / Drinks

Cocktail ABV Calculator

Compute the final alcohol-by-volume (ABV) of a mixed drink from up to three alcoholic ingredients (each with their own A...

Basic

18,180 4.9 1 min

Everyday Life

Roof Shingles Bundles from Square Footage Calculator

Compute the number of asphalt-shingle bundles needed to cover a given roof area, including a default 10-15 % waste facto...

Basic

24,154 4.3 1 min

Sports

Bowling Handicap from Average Calculator

Compute a tenpin bowler's handicap from their league average: handicap = round(max(0, base − avg) × percentage). The mos...

Basic

5,568 4.1 1 min

Everyday Life

Restaurant Bill Gratuity & Split Calculator

Calculates the tip amount, total bill, and per-person share for a restaurant meal from bill amount, tip percentage, and...

Basic

21,937 4.7 1 min

Health

Weight Loss Weeks to Goal from Deficit Calculator

Estimates the number of weeks needed to reach a weight loss goal based on the daily calorie deficit. Uses the 7,700 kcal...

Basic

20,612 4.5 1 min

Everyday Life

Roof Shingle Bundles Needed Calculator

Compute the number of standard 3-tab asphalt shingle bundles needed for a sloped roof, given roof area, a waste allowanc...

Basic

8,549 3.9 1 min

Ecology / Energy

Household Electricity Emissions Calculator

Estimate the annual CO₂ equivalent emissions from your home electricity use, given monthly kWh consumption and the carbo...

Basic

15,808 3.9 1 min

Everyday Life

R-Value Heat Loss Calculator

Compute the steady-state heat-loss rate through a wall, ceiling, or floor section from its R-value, surface area, and te...

Basic

6,463 4.6 1 min

Construction / Materials

Carpet Calculator

Compute the square footage of a rectangular room and the total cost to carpet it at a given price per square foot or per...

Basic

11,520 4.7 1 min

Everyday Life

Tip Amount and Per-Person Bill Split Calculator

Calculates tip = bill × tip%, total = bill + tip, and share per person = total / number of people. Supports custom tip p...

Basic

12,693 4.5 1 min

Finance / Investing

Sharpe Ratio Risk-Adjusted Return Calculator

Calculates the Sharpe ratio of a portfolio from its return, risk-free rate, and standard deviation of returns.

Basic

16,076 4.5 1 min

Physics

Wheatstone Bridge Balance & Unknown Resistance

Calculates the unknown resistance Rx in a balanced Wheatstone bridge from the three known resistors.

Basic

4,004 3.9 1 min

Showing 169 to 180 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

Cocktail ABV Calculator

Roof Shingles Bundles from Square Footage Calculator

Bowling Handicap from Average Calculator

Restaurant Bill Gratuity & Split Calculator

Weight Loss Weeks to Goal from Deficit Calculator

Roof Shingle Bundles Needed Calculator

Household Electricity Emissions Calculator

R-Value Heat Loss Calculator

Carpet Calculator

Tip Amount and Per-Person Bill Split Calculator

Sharpe Ratio Risk-Adjusted Return Calculator

Wheatstone Bridge Balance & Unknown Resistance

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost