Tools & Calculators
29 free tools, every one tuned to your nearest official weather station and built to run in your browser with no account and nothing to install. Set your place once and it follows you from tool to tool.
Garden & growing
Plan the beds, time the sowing, and follow the sun.
Planting Grid Designer Lay out a square-foot bed, drop in crops, and get each one’s sowing and harvest dates. Succession Planting Planner The dates to sow lettuce, beans, and radishes in waves for a steady harvest, not one glut. Crop Rotation Planner A ready-made four-bed, four-year rotation that feeds the soil and breaks pest cycles. Frost & Planting Calendar Every vegetable’s sow-and-plant window, worked from your station’s frost dates. Frost Countdown Days until your next frost, and how much of the growing season is still ahead. Sun & Shade Planner The sun’s path, daylight length, and golden hour for any day where you live. Lawn Calculator Grass-seed and fertilizer amounts, with the best week to seed and feed. Container & Balcony Planner Minimum pot depth and size per crop for a balcony or patio, with the container season. Drip Irrigation Run-Time How long and how often to run drip for an inch a week, scaled to your summer heat. Pollinator Garden Planner Build a bloom calendar from native plants so pollinators are fed spring to frost.
Home projects
Buy the right amount and pick the right week.
Mulch & Soil Calculator Cubic yards and bag counts of mulch, soil, compost, or gravel for any bed. Paint & Stain Calculator Gallons for the job, plus the temperature window and season to paint outside. Ice Melt & Salt Calculator The right amount of de-icer, with a warning when it runs too cold for rock salt. Firewood & Cord Calculator Measure a stack into cords, compare the heat in each wood, size a heating season. Concrete & Sealer Calculator Cubic yards and bag counts for a slab, or sealer coverage, with the pour-season window. Rain Barrel & Water Capture Gallons a roof catches from a given rain, barrels to hold it, and when to drain. Furnace & AC Sizing A rough heating and cooling size, with BTU per foot set from your local climate. Solar Panel Payback Yearly output, savings, and years to break even, with sun-hours from your region. Canning Altitude Adjuster Correct a tested recipe for your elevation: the added boiling-water time, or the right pressure. Pool Calendar When to open and close the pool for your local season.
Know your place
The shape of your year, and how it compares.
Your Home's Year The whole year on one wheel: frost, planting, pool, tires, and the upkeep that follows. Your Year, In Order The same year as a followable plan, in order, each task linked to the tool that times it. Climate Twin Finder The town whose year of temperatures runs almost exactly like yours. Growing Season Length How long your frost-free season runs and where it ranks nationally. Winter & Summer Index Two scores for how hard your winter bites and how lush your summer grows. The Frost Atlas Frost dates and growing seasons mapped across the country. Weather & Work Windows Your local forecast with the right days flagged for outdoor jobs.
Moving & climate
What changes when you change address.
Everything here is free and always will be. The Almanac is built on NOAA and U.S. government data, refreshed on a schedule, with every figure traceable to its source. How it stays free.