Mohamed Zakrya
Mohamed Zakrya builds calculator and tools websites, including Viral Rang and RekenmachinePro.nl (295+ free calculators). He has been publishing online for over a decade. Every tool he ships shows its formula and is covered by automated tests.
Articles
How Much Paint Do I Need? Room-by-Room Answers With Real Math
Real gallon counts for every common room size — and the four numbers that change them.
5 min read
How Much Concrete Do I Need? Slab Math, Bag Counts, and When to Call the Truck
Yards and bag counts for real projects — patios, shed slabs, and deck piers — with the ordering math nobody tells you.
5 min read
How Much Mulch Do I Need? Bed-by-Bed Math in Yards and Bags
Real numbers for straight beds, curved borders, and tree rings — plus which mulch to actually buy.
5 min read