The OmniCalcs Blog

Guides that explain the formulas behind the numbers.

Finance · 6 min read

How Mortgage Calculations Work

Break down principal, interest, taxes and insurance.

Health · 4 min read

How to Calculate BMI (and What It Misses)

The formula, healthy ranges, and its real limits.

Finance · 5 min read

Compound Interest, Explained Simply

Why time matters more than the rate itself.

Finance · 5 min read

How Much Should Your Emergency Fund Be?

The 3–6–12 month rule, explained with real math.

Health · 5 min read

What Is a Calorie Deficit?

BMR, TDEE and the math behind sustainable loss.

Math · 4 min read

The Quadratic Formula, Explained

The discriminant, the vertex, and why it matters.

What We Write About

New articles appear regularly. We cover the math behind our calculators, practical everyday finance, health metrics and handy web tips — all written to be read in five minutes.