All categories
42 tools in 8 categoriesRandom Generators
View all 1 tools →Soil & Ground Cover
View all 11 tools →Project Costs
View all 6 tools →Water & Drainage
View all 6 tools →Lawn & Grass
View all 5 tools →Trees & Plants
View all 5 tools →Patios, Walls & Paving
View all 4 tools →Everything you need to simplify your life.
Free tools, smart apps, and powerful solutions to make your life, business, work, and learning easier.
No tools match .
Our Most Popular Tools
We present the best of the best. All free, no catch
Gravel Calculator
Soil & Ground Cover
Work out the gravel a driveway, drain or patio base needs, in layers, with compaction accounted for, so you order the right amount the first time.
CPM Calculator
Ad Metrics
Work out cost, impressions or CPM, estimate publisher revenue and eCPM, and compare CPM, CPC and CPA offers on one basis.
Mulch Calculator
Soil & Ground Cover
Work out how much mulch you need in bags or cubic yards, plus weight and cost, for one bed or several beds added together. Depth guidance sourced from university extension research.
Random Object Generator
Random Generators
Generate a random object from almost 9,700 curated items, filtered for drawing, writing, games, vocabulary or history, with a ready-made prompt for each one.
Soil Calculator
Soil & Ground Cover
Work out how much garden soil, fill dirt or a compost blend you need in bags or cubic yards, plus weight in tons and cost, for one bed or several added together. Density sourced from a Wisconsin DOT research report and USDA guidance.
Topsoil Calculator
Soil & Ground Cover
Work out how much topsoil you need in cubic yards or tons, for filling a low spot, grading a yard or topdressing a lawn. Weight sourced from a Wisconsin DOT research report, topdressing depth from university turf extension guidance.
Sand Calculator
Soil & Ground Cover
Work out how much sand you need in bags, cubic yards or tons, for a paver bedding layer, a sandbox, general fill or a mortar mix. Depth sourced from the ICPI paver installation standard, weight from a Wisconsin DOT research report.
Paver Calculator
Patios, Walls & Paving
Count the pavers, gravel base, bedding sand and edge restraint a patio or path needs: sized to your paver size and laying pattern, not just area and depth.
Gravel Calculator
Soil & Ground Cover
Work out the gravel a driveway, drain or patio base needs, in layers, with compaction accounted for, so you order the right amount the first time.
Mulch Calculator
Soil & Ground Cover
Work out how much mulch you need in bags or cubic yards, plus weight and cost, for one bed or several beds added together. Depth guidance sourced from university extension research.
Soil Calculator
Soil & Ground Cover
Work out how much garden soil, fill dirt or a compost blend you need in bags or cubic yards, plus weight in tons and cost, for one bed or several added together. Density sourced from a Wisconsin DOT research report and USDA guidance.
Topsoil Calculator
Soil & Ground Cover
Work out how much topsoil you need in cubic yards or tons, for filling a low spot, grading a yard or topdressing a lawn. Weight sourced from a Wisconsin DOT research report, topdressing depth from university turf extension guidance.
Sand Calculator
Soil & Ground Cover
Work out how much sand you need in bags, cubic yards or tons, for a paver bedding layer, a sandbox, general fill or a mortar mix. Depth sourced from the ICPI paver installation standard, weight from a Wisconsin DOT research report.
Paver Calculator
Patios, Walls & Paving
Count the pavers, gravel base, bedding sand and edge restraint a patio or path needs: sized to your paver size and laying pattern, not just area and depth.
Sod Calculator
Lawn & Grass
Work out how much sod to order, in rolls or pallets, with a sourced waste allowance for cuts and curves, plus an editable cost estimate.
Tree Removal Cost Calculator
Project Costs
Estimate tree removal cost by height, trunk diameter and site access, with stump grinding priced as a separate add-on, sourced from Angi's 2026 national data.
CPM Calculator
Ad Metrics
Work out cost, impressions or CPM, estimate publisher revenue and eCPM, and compare CPM, CPC and CPA offers on one basis.
CTR Calculator
Ad Metrics
Work out click-through rate, clicks or impressions, test whether one ad's CTR really beats another's, and see what a better CTR is worth.
ROAS Calculator
Ad Metrics
Work out return on ad spend, find the break-even ROAS your margin demands, and set a target ROAS that keeps the profit you want.
CPC Calculator
Ad Metrics
Work out cost per click, find the most you can afford to pay per click, and convert CPC to CPM and cost per sale.
Numbers you can
actually trust.
A calculator that's wrong costs real money, whatever it's calculating: an under-ordered patio base, ad spend planned around the wrong number.
Built and checked by the Bunny Corner team; every formula is confirmed against two independent sources before it ships.
Read the full sourcing policyPrimary sources, never a copy
Government agencies, platform documentation and manufacturer specs — not another site’s calculator.
Checked against two sources
Before a formula ships, it’s confirmed against two independent references that don’t cite each other.
Ranges stay ranges
Where a source gives a range, the calculator carries it through instead of faking a single precise number.
Region and platform labelled
A figure that only holds for one climate, market or ad platform says so on the page.
Why Bunny Corner
100% Free
Every calculator, fully free: no paywalls, no premium tier.
No Sign Up
Use any tool instantly. No account, no email required.
Secure & Private
Calculations run in your browser. Nothing you enter is stored.
Always Updated
Formulas and material data are reviewed and refreshed regularly.
Some rules we refuse to break.
Copy numbers from competing calculators.
Generate figures with a language model.
Invent false precision.
Treat marketing copy as a spec.
Every rule, explained in full:read our sourcing policy →
Ready to get things done?
Explore the full toolbox: free, fast, and private. No account, no clutter, just tools that work.