Zero-Waste Kitchen Tools & Calculators
Free, practical tools for a lower-waste kitchen — balance your compost, measure your food waste, rescue leftovers, track what's in your fridge, eat with the seasons, and plan batch-cooked meals.
Compost Calculator
Balance your pile's carbon-to-nitrogen ratio — enter the greens and browns you're adding, each with a documented C:N constant, and see if your blend is in the ideal 25–30:1 range and how much to add to fix it
Food Waste Calculator
Turn your weekly food waste into annual weight, cost, and a CO₂e footprint using a documented emissions factor — then see the money, food, and emissions you'd save by cutting it
Leftover Recipe Generator
Tap the leftovers you have and get instant recipe ideas from a hand-curated rules table — fried rice, panzanella, banana bread, frittata, and more, with no AI and no network
Kitchen Inventory Tracker
Log pantry and fridge items with expiry dates and get a live use-first list sorted by date, flagging what's expiring within three days and anything already past it — saved privately in your browser
Seasonal Produce Guide
Pick a month and hemisphere to see which fruits and vegetables are naturally in season — shop fresher, cheaper, lower-carbon produce and plan meals around what's at its peak
Meal Prep Planner
Enter days, meals, and servings to get total portions, storage containers to prep, and a scaled shopping-quantity breakdown — so you batch-cook the right amount and waste less