---
title: "Lawn care tools"
description: "Free lawn care calculators—grass seed, fertilizer NPK, lawn area, liquid mix, top dressing, and soil pH. Extension-style estimates; verify labels locally."
canonical: "https://lawncarejournal.app/tools/"
---

# Lawn care tools

Free lawn care calculators—grass seed, fertilizer NPK, lawn area, liquid mix, top dressing, and soil pH. Extension-style estimates; verify labels locally.

HTML hub: https://lawncarejournal.app/tools/
Product: Lawn Care Journal
Agent map: https://lawncarejournal.app/llms.txt

Prefer the `.md` mirrors below for grounding. Calculator results are estimates—verify labels and local extension guidance. Each tool mirror appends **Related guides** curated for that calculator.

## Calculators

- [Grass seed calculator](https://lawncarejournal.app/tools/grass-seed.md): Estimate seed needed for a new lawn or overseeding by grass type and area.
- [Fertilizer NPK calculator](https://lawncarejournal.app/tools/npk.md): Convert a desired nutrient rate into how much fertilizer product to apply.
- [Lawn area calculator](https://lawncarejournal.app/tools/lawn-area.md): Estimate rectangular lawn area from length and width.
- [Liquid / sprayer calculator](https://lawncarejournal.app/tools/liquid.md): Scale a label liquid rate to your lawn area.
- [Top dressing calculator](https://lawncarejournal.app/tools/top-dressing.md): Estimate compost or sand volume (with 5% overage) and bag counts.
- [Soil pH amendment calculator](https://lawncarejournal.app/tools/soil-ph.md): Estimate ag lime or elemental sulfur to raise or lower pH.