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Everything you need to simplify your life.

Free tools, smart apps, and powerful solutions to make your life, business, work, and learning easier.

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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Our Methodology

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 policy
  1. Primary sources, never a copy

    Government agencies, platform documentation and manufacturer specs — not another site’s calculator.

  2. Checked against two sources

    Before a formula ships, it’s confirmed against two independent references that don’t cite each other.

  3. Ranges stay ranges

    Where a source gives a range, the calculator carries it through instead of faking a single precise number.

  4. 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.

What we won't do

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 →

Free tools, no signup

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