Resin Calculator

Calculate exactly how much resin & hardener you need for your project

Step 1 — Application Type
Step 2 — Shape
Step 3 — Resin : Hardener Ratio
Step 4 — Dimensions
Please fill in all fields with valid values.
Your Resin Estimate
100% Free Tool No login or signup needed
7 Shapes Supported Rectangle, square, circle, oval, triangle, hexagon & octagon
2:1 & 3:1 Ratios Switch ratios instantly for casting or coating
Made for India Inches & ml — units Indian artists actually use
Beginner Friendly Step-by-step guide & FAQs below
Accurate Results Instant resin + hardener split in ml

The Anahat Kalaa resin calculator tells you exactly how much epoxy resin and hardener you need before you mix — for coasters, trays, tabletops, jewelry, geode art, keychains, wall art and more. Just pick Coating or Casting, choose your shape, enter your measurements in inches, and select your resin-to-hardener ratio (2:1 or 3:1) — the calculator instantly works out the exact resin and hardener quantity in ml, so you mix the right amount the first time, every time.

How to Use the Resin Calculator (Step-by-Step)

  1. 1

    Choose Coating or Casting

    Coating is for a thin top layer on art, tables or boards. Casting is for pouring resin into a mould to create a solid piece — jewelry, coasters, keychains, decor.

  2. 2

    Pick Your Shape

    Select from rectangle, square, circle, oval, triangle, hexagon or octagon to match your mould, tray or surface.

  3. 3

    Enter Your Measurements

    Type in the length, width, diameter or side in inches. For Casting, also add the thickness/depth.

  4. 4

    Select Your Mixing Ratio

    Choose 2:1 or 3:1 based on the ratio printed on your resin and hardener bottles.

  5. 5

    Get Your Result

    The calculator instantly shows the total resin needed and the exact split between resin (Part A) and hardener (Part B) in ml.

  6. 6

    Mix a Little Extra

    Add 5–10% to the result to cover resin that sticks to your mixing cup and stir stick — see the FAQ below for details.

Coating Resin vs Casting Resin — What's the Difference?

Coating Resin

  • Used for a thin, glossy top layer (typically a few mm)
  • Applied over paintings, tabletops, boards, doming
  • Cures faster and generates less heat
  • In this calculator: select "Coating" and skip the depth field

Casting Resin

  • Used for deeper pours into a mould to form a solid piece
  • Common for jewelry, coasters, keychains, geode art, river tables
  • Cures slower to reduce heat build-up and cracking in thick pours
  • In this calculator: select "Casting" and enter the thickness/depth

Frequently Asked Questions About Resin Calculation

How much resin do I need for my project?

Enter your project's length, width or diameter and (for casting) the thickness into the calculator above, choose your shape and ratio, and it instantly shows the total resin and hardener quantity in ml. As a rule of thumb, mix 5–10% extra to cover spillage and the resin left in your mixing cup.

What is the difference between casting resin and coating resin?

Coating resin is used for a thin protective top layer over art, tables and boards. Casting resin is formulated for deeper pours into a mould to make solid pieces like jewelry, coasters and decor, and cures slower so thicker pours don't crack or overheat.

What is the correct resin to hardener ratio — 2:1 or 3:1?

It depends on the specific resin you're using — always check the ratio printed on your resin and hardener bottles. This calculator supports both 2:1 and 3:1 ratios, so once you select the right one, the resin and hardener split is calculated automatically.

Can I use this calculator with any resin brand?

Yes. The calculations are based on your project's volume and the mixing ratio you select, so they work with any epoxy or art resin brand. Just confirm the resin-to-hardener ratio on your specific product's label and pick the matching ratio in the calculator.

How much extra resin should I mix to avoid running short?

Most resin artists mix 5–10% more than the calculated amount, since some resin always sticks to the mixing cup, stir stick and gloves. For larger pours, mix closer to 10% extra.

How do I calculate resin for an irregular or custom-shaped mould?

For irregular shapes like geodes or custom cutouts, use the water displacement method: fill your mould with water up to the level you plan to pour resin, then pour that water into a measuring cup. The volume of water shown is the amount of resin you need.

What units does this resin calculator use?

Enter your dimensions (length, width, diameter, side, base, height) in inches, and depth/thickness in millimetres for casting projects. The result is shown in millilitres (ml), so you can measure with a standard resin mixing cup.

Is this resin calculator really free to use?

Yes — the Anahat Kalaa resin calculator is completely free, with no login or signup required. Use it for as many projects as you like.

Built for Resin Artists Across India

Most online resin calculators are built around US or European units and resin brands. The Anahat Kalaa resin calculator is built around how Indian resin artists actually work — measurements in inches, results in ml, and support for the 2:1 and 3:1 ratios most common in art resins sold in India.

Whether you're a hobbyist getting started with your first coaster set, or a professional resin artist working on bulk orders, trays and river tables, this calculator helps you plan your pour and avoid wastage — every time.