How to Blend Multiple Flake Colors Without Running Short on One
Splitting a total flake order across colors by percentage, and why the blend has to add up to exactly 100% before you order.
Last updated August 20, 2026
A custom flake blend is just your total flake order split across colors by percentage, but those percentages have to add up to exactly 100% before you order, or you’ll either run short on one color mid-broadcast or over-order another. The Flake Color Blend Calculator tracks the running total as you go.
Get the total right before you split it
This calculator divides a number you give it. It has no opinion about whether that number is correct, so an error in the total is an error in every color at once, scaled by its share. Size the floor first on the Flake Broadcast Calculator, then bring the result here.
The order matters more than it sounds. A blend that came out of a color card feels like the starting point of the job, but it is the second step. Percentages are meaningless until there is a weight for them to be percentages of.
How to read the inputs
Total Flake Needed
- Your whole flake order for the job. Get this number from the Flake Broadcast Calculator first
Color Name & Blend %
- Add a row per color with its share of the blend. Up to 8 colors, and rows can be added or removed
Quantity (per color)
- Calculated automatically from the total and that color’s percentage. This is what you order for that color
Running Total
- Shows how far under or over 100% your blend currently is. It needs to read exactly 100% before the quantities are final
Worked example
An 80 lb flake order, blended for a “Storm” look: White at 50%, Silver at 30%, and Charcoal at 20%, which is 100% total. White = 80 × 0.50 = 40 lb, Silver = 80 × 0.30 = 24 lb, and Charcoal = 80 × 0.20 = 16 lb. Order each color to that figure, not a rounded guess.
Try it with your own blend
Add a row per color and adjust the percentages. The running total shows when you've hit exactly 100%.
Full result gives an exact quantity per color once the blend totals 100%.
Open the live calculator →How your supplier sells it changes everything
This tool gives you exact weights per color because that is how custom blends are usually bought: by weight, or as a pre-mixed blend the supplier makes up to your percentages. A single-color full broadcast is different, and gets counted in whole boxes.
If your supplier will only sell whole boxes per color, the arithmetic stops being a division and becomes a constraint. A 540 ft² garage needs 77.1 lb of flake. Split 50/30/20 that is 38.6 lb, 23.1 lb and 15.4 lb, but three colors bought as one 40 lb box each is 120 lb, which is 56% more flake than the floor takes. Find out which way your supplier works before you promise a client a four color blend on a small floor.
When a color’s share is too small to buy
Small accent percentages are where blends fall apart in practice. On the 540 ft² job above, a color at 5% works out to 3.9 lb, which many suppliers will not break a box for and some will not weigh out at all.
You have three honest options, and the calculator makes the trade visible while you decide. Raise that color to whatever share clears the minimum and take the difference off the others. Drop it from the blend entirely. Or accept a larger total and carry the surplus. What you should not do is order it anyway and hope, because a color that arrives short gets stretched across the floor and shows as a gradient.
There is a design argument here too. A share small enough to sit under a supplier minimum is usually too sparse to read as a distinct color once it is scattered across a whole floor. If the arithmetic is telling you a color is marginal, the finished floor will probably agree.
The blend on the card is not the blend on the floor
Scale
- A sample board is a few inches across and a floor is not. Proportions that read as a tight speckle on a card read as broad patches at room scale
Broadcast technique
- Blends separate if colors go down in sequence rather than pre-mixed. Mix the full order before you start throwing, not box by box
Chip size
- The same percentages in a larger chip give fewer, bigger flecks of each color, so the blend reads coarser even though the ratio is identical
Lighting
- Low-contrast blends flatten out under the fluorescent or LED lighting most garages and workshops actually have. Judge a sample in the room’s own light
Write the recipe down
Percentages are the only durable record of a blend. The boxes get emptied, the offcuts get swept up, and a photograph will not tell you whether the mid gray was 30% or 35%. A repair patch, a phase two extension, or a client who wants the same floor in another building all depend on a number you either wrote down or didn’t.
Save the percentages, the chip size, and the supplier’s color names with the job record. Color names are not standard between manufacturers, so the brand matters as much as the shade.
Common mistakes
- Ordering before the percentages actually total 100%, when even a small gap means one color runs short or over
- Eyeballing a blend instead of committing to exact percentages, which makes the broadcast harder to keep consistent across the floor
- Not checking a color’s quantity against the supplier’s minimum order before finalizing the blend
- Splitting a total that was never right in the first place, when an error in the floor area is an error in every color at once
- Promising a multi-color blend on a small floor without knowing whether the supplier sells by weight or by whole boxes per color
- Broadcasting the colors in sequence instead of mixing the full order first, which separates the blend across the floor
- Not recording the exact percentages used, making a later patch or repair hard to color-match
Frequently Asked Questions
What happens if my percentages don’t add up to 100%?
The calculator flags it. A running total shows how far under or over you are. Under 100% means some flake is unaccounted for; over 100% means you’ve over-specified the mix. Adjust the percentages until the total reads exactly 100% before ordering.
Can I just eyeball a blend instead of using exact percentages?
You can, but it’s the most common way to run short on one color mid-broadcast. Committing to exact percentages up front, and ordering to match, is what keeps the blend consistent across the whole floor, and repeatable if you need to match it later.
What if a color’s percentage rounds to less than my supplier’s minimum order?
Either bump that color’s percentage up to meet the minimum (adjusting the others down to compensate) or drop it from the blend. A percentage too small to meet a minimum order usually wouldn’t read as a distinct color in the finished floor anyway.
Should I record the exact percentages I used?
Yes. Save the blend recipe with the job. If you need to patch, repair, or match the same floor later, the exact percentages are what let you reproduce the same look instead of guessing from a photo.
Can I just order each color as a whole box?
Only if the floor is large enough to absorb it. Custom blends are usually bought by weight, or pre-mixed by the supplier to your percentages, which is why this calculator gives exact quantities rather than box counts. If your supplier will only sell whole boxes per color, a 540 ft² garage needing 77.1 lb of flake would take three 40 lb boxes for a three color blend, which is 120 lb and 56% more flake than the floor takes. Check how your supplier works before promising a client a multi color blend on a small floor.
What if one color is too small a share to order?
You have three honest options: raise that color to whatever share clears the supplier minimum and take the difference off the others, drop it from the blend, or accept a larger total and carry the surplus. On a 540 ft² floor a 5% accent is only 3.9 lb, which many suppliers will not break a box for. A share that small usually would not read as a distinct color across a finished floor anyway.