The math, done for you

Free hosting tool

How much food for a party? The party food calculator

Guests, hours, style. That's all it takes to stop over-buying shrimp and under-buying ice.

Free coffee tool

Coffee-to-water ratio calculator

Your water, your method — the exact dose of coffee in grams, with a tablespoon fallback for mornings without a scale.

Free home tool

How many lumens does a room need?

Rooms feel wrong long before you can say why. Usually it's the light — too little, or all from one place.