The Farmer's Toolkit: Free Online Tools for Modern Agriculture

Farming has always demanded a unique blend of skills — part scientist, part mechanic, part accountant, part weatherman. Whether you're managing a thousand-acre grain operation, running a small diversified farm, or raising livestock, there's no shortage of calculations, records, and decisions to juggle on any given day. And while there's no app that can fix a broken fence or pull a calf, the right digital tools can take some of the mental load off your plate.

FreeWWW offers a growing collection of completely free, browser-based tools — no downloads, no accounts, no subscriptions. Several of them were built with farmers and ranchers specifically in mind. In this post, we'll walk through eight tools that can help you plan your season, manage your animals, track your harvests, and run the business side of your operation a little more smoothly.

Farming Tool Suite

The Farming Tool Suite is the centerpiece of FreeWWW's agriculture offerings, and it packs twenty calculators into a single free tool. You'll find a Seed Rate Calculator for dialing in your planting population, a Fertilizer Calculator to figure application rates based on field size and nutrient needs, and a Pesticide Calculator to get your tank mixes right. There's an Irrigation Calculator for estimating water requirements, a Crop Yield Calculator for projecting what's coming off the field, and a Farm Budget Calculator that helps you see whether the numbers actually work before you commit to a plan.

On the livestock side, the suite includes a Feed Conversion Calculator, Livestock Weight Calculator, Milk Production Tracker, and Egg Production Tracker — handy whether you're running cattle, dairy, or poultry. For planning purposes, you get a Planting Date Calculator, Harvest Date Calculator, Crop Rotation Planner, Growing Degree Day Calculator, Frost Date Calculator, and Season Length Calculator. Rounding things out are a Soil pH Calculator, Nutrient Calculator, Field Area Calculator, and a Weather Log for keeping notes on conditions throughout the season. It's a lot of ground covered in one place, and it's worth bookmarking if you haven't already.

Livestock Herd & Flock Manager

If you raise animals, record-keeping can quickly become its own full-time job. The Livestock Herd & Flock Manager gives you a single place to track individual animals, breeding dates and cycles, health events, weight records, feed logs, and basic financial data. It's designed to work for cattle, sheep, goats, poultry, hogs, or any other livestock you might be managing.

Everything is stored privately on your device, so you're not handing your herd data over to a third party. Whether you need to check when a cow is due to calve, review a vaccination history before a vet visit, or just get a clear picture of your herd's performance over time, this tool keeps that information organized and accessible without the cost of dedicated livestock software.

Grain Bin & Storage Calculator

Knowing your storage capacity and managing grain moisture are critical parts of post-harvest decision-making. The Grain Bin & Storage Calculator lets you calculate bin capacity based on your bin's dimensions, convert between moisture content levels, and estimate drying costs using your actual fuel prices. It supports over thirty grain types and works in both imperial and metric units.

This is the kind of tool that earns its keep during harvest season. Instead of guessing whether you have room for another load or doing napkin math on drying costs, you can get solid numbers in a few seconds. It's simple, focused, and built for the decisions grain farmers actually face.

Planting Calendar & Zone Finder

Getting your timing right is one of the most important factors in a successful growing season. The Planting Calendar & Zone Finder helps you determine your USDA hardiness zone and then generates a personalized planting schedule for vegetables, fruits, and herbs based on your location. It's especially useful if you're running a market garden, diversified vegetable operation, or even just maintaining a kitchen garden alongside your main enterprise.

Rather than flipping through seed catalogs and cross-referencing frost dates, you can get a clear, location-specific timeline for when to start seeds indoors, transplant, and direct sow. It pairs well with the Frost Date and Season Length calculators in the Farming Tool Suite for a complete picture of your growing window.

Garden Companion

Companion planting is one of those areas where a little planning goes a long way. The Garden Companion tool helps you discover which plants grow well together and which ones are better kept apart. If you're interplanting, managing pest pressure through biodiversity, or just trying to make the most of limited garden space, this tool gives you a quick reference for making smart planting neighbors.

For market farmers and homesteaders who grow a wide variety of crops in relatively tight spaces, companion planting knowledge can improve yields and reduce pest problems without added chemical inputs. It's a small tool, but it addresses a question that comes up constantly during planting season.

Sunrise/Sunset Calculator

When your workday is dictated by daylight, knowing exactly when the sun rises and sets matters more than it does for most people. The Sunrise/Sunset Calculator gives you precise sunrise and sunset times for your location, which helps with planning everything from early-morning fieldwork to evening chores and livestock management.

It's also useful for scheduling irrigation, planning hay cutting around drying time, or simply knowing how many hours of working light you have on a given day. During the busy stretches of planting and harvest season, squeezing every usable minute out of the day is just part of the job, and having accurate times at a glance helps you plan accordingly.

Air Quality Index Checker

Air quality might not be the first thing you think of as a farming tool, but it matters more than many growers realize. The Air Quality Index Checker lets you check current air quality conditions for your area, which is relevant for several reasons on the farm.

Wildfire smoke has become an increasingly common concern in many agricultural regions, affecting both outdoor working conditions and crop health. If you do any open burning of fields or brush, air quality districts in many areas require you to check conditions before lighting up. And for livestock producers, poor air quality can stress animals, particularly poultry and other confined livestock. Having a quick way to check the AQI before heading out for a long day of fieldwork is a practical habit worth building.

Invoice, Receipt & Quote Generator

Farming is a business, and at some point you need to get paid. The Invoice, Receipt & Quote Generator lets you create professional invoices, receipts, quotes, and proposals with automatic calculations and PDF export. Whether you're selling hay to a neighbor, billing a customer for a side of beef, delivering produce to a restaurant, or quoting a land-clearing job, having a clean, professional document ready to go makes the transaction smoother for everyone.

It's one of those tools that's not agriculture-specific but fills a real need on the farm. Many small and mid-sized farm operations don't need full accounting software just to send an invoice, and this tool handles the job without any cost or complexity.

Farming involves a remarkable range of skills and decisions, and while no set of online tools can replace experience and hard work, the right ones can save you time and help you make better-informed choices. Every tool mentioned here is completely free to use, runs right in your browser, and doesn't require you to create an account or hand over personal information.

Explore these tools and hundreds more at FreeWWW.com — all completely free, no account required.