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

Sand Tonnage Calculator

Compute the tons of sand needed to cover an area at a target depth, using a typical density of 1.35 tons per cubic yard...

basic

4,660 3.9 1 min

Sports / Running

Marathon Negative Split Target Pace Calculator

Calculates first-half and second-half target paces for a marathon negative split strategy from goal finish time and spli...

basic

7,173 3.9 1 min

Physics

Sound Intensity Level Decibel Calculator

Converts between sound intensity (W/m²) and intensity level in decibels (dB). Reference intensity I₀ = 10⁻¹² W/m² (thres...

basic

3,655 4.8 1 min

Health

Daily Water Intake Recommendation from Weight Calculator

Estimates recommended daily fluid intake: ≈ 30–35 mL/kg/day (baseline) + extra for exercise. Also shows cups (US) and fl...

basic

13,496 4.8 1 min

Everyday Life

Electricity Bill from Appliance Usage Calculator

Calculates daily and monthly energy: kWh = power(W) × hours/day / 1000. Monthly cost = kWh × days × unit_price. Useful f...

basic

13,067 4.6 1 min

Finance

Inventory Reorder Point from Lead Time and Demand Calculator

Calculates the reorder point ROP = (average daily demand) × (lead time in days) + safety stock, ensuring stock does not...

basic

2,970 4.7 1 min

Finance / Investing

NPV from Multiple Cash Flows and Discount Rate Calculator

Calculates NPV = Σ CF_t/(1+r)^t − Initial investment for up to 5 periods. Positive NPV indicates value creation.

basic

14,601 4.0 1 min

Ecology / Carbon Footprint

Tree CO₂ Sequestration Calculator

Estimate the annual CO₂ that a young hardwood tree absorbs from the atmosphere (typically about 22 kg per year over the...

basic

24,100 4.4 1 min

Sports

Cricket Batting Strike Rate from Runs and Balls Calculator

Compute a batter's strike rate — the most important rate stat for one-day and T20 cricket: SR = (runs scored / balls fac...

basic

14,577 4.4 1 min

Everyday Life

Ceiling Fan Blade Span by Room Area Calculator

Recommend a ceiling-fan blade span (sweep diameter) appropriate for a room's floor area, using ENERGY STAR / ASHRAE-styl...

basic

7,296 4.4 1 min

Sports

Cycling VAM Vertical Ascent in Metres-per-Hour Calculator

Compute a cyclist's VAM (Velocità Ascensionale Media) — vertical ascent in metres per hour: VAM = elevation_gain_m · 360...

basic

1,751 4.1 1 min

Construction / Materials

Mulch Calculator

Estimate how many cubic yards (or cubic feet) of mulch you need to cover a garden bed of any size to a chosen depth.

basic

20,006 4.9 1 min

Showing 97 to 108 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

Sand Tonnage Calculator

Marathon Negative Split Target Pace Calculator

Sound Intensity Level Decibel Calculator

Daily Water Intake Recommendation from Weight Calculator

Electricity Bill from Appliance Usage Calculator

Inventory Reorder Point from Lead Time and Demand Calculator

NPV from Multiple Cash Flows and Discount Rate Calculator

Tree CO₂ Sequestration Calculator

Cricket Batting Strike Rate from Runs and Balls Calculator

Ceiling Fan Blade Span by Room Area Calculator

Cycling VAM Vertical Ascent in Metres-per-Hour Calculator

Mulch Calculator

Unit Conversion Without Typos: A Field Guide

Running Pace: How to Read Splits Without Getting Lost