The latest articles on DEV Community by william lao (@william_lao_0c017fe1ee6cb). https://dev.to/william_lao_0c017fe1ee6cb https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4156747%2F207c4733-c1d8-44f7-a339-2be7929d1980.jpg https://dev.to/william_lao_0c017fe1ee6cb en william lao Fri, 02 Oct 2026 07:52:02 +0000 https://dev.to/william_lao_0c017fe1ee6cb/show-dev-agricalc-free-science-based-agriculture-calculators-as-an-offline-first-pwa-ebh https://dev.to/william_lao_0c017fe1ee6cb/show-dev-agricalc-free-science-based-agriculture-calculators-as-an-offline-first-pwa-ebh <p>Hey devs! I want to share a project I built: Agricalc (<a href="https://agricalc.online" rel="noopener noreferrer">https://agricalc.online</a>), a free collection of science-based agriculture calculators.</p> <p>What it does:</p> <ul> <li>Covers the full farming cycle — planting, fertilization, irrigation, harvest, and marketing</li> <li>Every calculator is built on established agricultural formulas and reference data</li> <li>Includes a 53-term agricultural glossary (CEC, GDD, evapotranspiration, N-P-K…)</li> </ul> <p>Why a PWA:</p> <ul> <li>Farms often have poor connectivity — the whole thing works offline once loaded</li> <li>No registration, no backend account needed</li> <li>Multi-language and mobile-friendly, designed to be used in the field on a phone</li> </ul> <p>Who it's for: farmers, agronomists, agricultural students, and anyone in crop and livestock production.</p> <p>GitHub repo: <a href="https://github.com/liulewis/agricalc" rel="noopener noreferrer">https://github.com/liulewis/agricalc</a></p> <p>I'd love feedback — especially from anyone with ag experience. Are the formulas matching what you use in practice? What calculators are missing?</p> showdev agriculture pwa javascript