Paint Mixing Calculator
Calculate paint color mixing ratios to achieve target colors from primary paints. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateMixing Recipe
Color Theory
Formula
This calculator uses RGB color space approximation to estimate mixing ratios. Real paint mixing is subtractive (pigments absorb light), while this uses a simplified model. Results are approximate starting points — always mix small test amounts first.
Last reviewed: December 2025
Worked Examples
Example 1: Mixing Saddle Brown
Example 2: Creating Sage Green
Background & Theory
The Paint Mixing Calculator applies the following established principles and formulas. Hobbies and crafts encompass an extraordinarily diverse range of practical skills, each with its own embedded mathematics. In knitting and crochet, yarn weight classification (lace, fingering, sport, worsted, bulky) determines gauge, typically expressed as stitches per 10 cm or per 4 inches. Yardage calculation requires knowing the area to be covered, the stitch pattern's yarn consumption rate, and a swatch-verified gauge, making it essential to buy sufficient yarn before a dye lot is exhausted. Fabric requirement calculation for sewing projects involves scaling a pattern to the correct size, accounting for seam allowances, fabric grain direction, and pattern repeat in printed textiles. Wood measurement in the United States commonly uses board feet, a volume unit defined as 1 inch × 12 inches × 12 inches. A board 2 inches thick, 6 inches wide, and 8 feet long contains (2 × 6 × 96) / 144 = 8 board feet. This unit allows lumber to be priced by volume regardless of dimensional format. Photography's exposure triangle describes the interdependence of aperture (f-stop), shutter speed, and ISO sensitivity in determining correct exposure. Each stop of change in any one variable doubles or halves the light reaching the sensor; maintaining correct exposure requires compensating with equal and opposite stops in one or more of the other variables. Music tempo is measured in beats per minute (BPM), and the mathematical relationship between BPM and note duration is precise: at 120 BPM, a quarter note lasts exactly 500 milliseconds, an eighth note 250 milliseconds, and a dotted quarter note 750 milliseconds. This relationship is fundamental to sequencing software, metronome use, and synchronising audio with video. Colour mixing in paint or pigment follows subtractive colour theory, where mixing primaries in specific ratios produces predictable secondary and tertiary colours, though the exact outcome depends on the pigment density and medium. Origami design relies on the consistent proportionality of square paper, with base fold ratios governing the proportions of the finished model.
History
The history behind the Paint Mixing Calculator traces back through the following developments. Craft production has been central to human culture for millennia, but the social organisation of skilled making underwent a decisive transformation in medieval Europe with the formation of craft guilds. These associations regulated training through apprenticeship, maintained quality standards, and controlled access to trade in specific goods such as textiles, metalwork, and woodworking. The guild system began to decline with industrialisation in the 18th and 19th centuries, as machine production displaced artisan labour. A cultural reaction to industrialisation emerged in Britain in the 1880s through the Arts and Crafts Movement, led by designer and theorist William Morris. Morris advocated for the intrinsic value of handmade objects and sought to restore dignity to craft labour, influencing architecture, textile design, book arts, and furniture making across Britain and the United States. The Victorian era also saw a broad expansion of middle-class hobby culture, with pursuits such as watercolour painting, embroidery, botanical illustration, and amateur natural history becoming markers of respectable leisure. The post-World War II period brought mass commercialisation of hobby supplies, as rising consumer incomes and the growth of the suburban lifestyle created demand for craft kits, model making, and DIY home improvement. Specialty retailers and hobby magazines proliferated through the 1950s and 1960s. The maker culture revival of the early 21st century represented a second wave of reaction to mass production, this time catalysed by digital fabrication technologies. Make magazine, launched in 2005, became the flagship publication for a community combining traditional craft skills with electronics, 3D printing, laser cutting, and open-source software. The democratisation of 3D printing through affordable desktop machines from around 2010 allowed hobbyists to design and produce custom parts, figurines, and tools at home. Online craft communities including Etsy, launched in 2005 as a marketplace for handmade goods, and Ravelry, founded in 2007 as a social network for knitters and crocheters, created global infrastructure for craft sharing, pattern distribution, and materials exchange.
Frequently Asked Questions
Formula
Mixed Color = Sum(Ratio × Pigment RGB) / Sum(Ratios)
This calculator uses RGB color space approximation to estimate mixing ratios. Real paint mixing is subtractive (pigments absorb light), while this uses a simplified model. Results are approximate starting points — always mix small test amounts first.
Worked Examples
Example 1: Mixing Saddle Brown
Problem: Mix saddle brown (#8B4513) from basic palette colors.
Solution: Start with Burnt Sienna as the base (closest single pigment)\nAdd a small amount of Ivory Black to deepen\nAdd a touch of Cadmium Red for warmth\nRatio approximately: 6 parts Burnt Sienna, 2 parts Black, 1 part Red\nAdjust with Yellow Ochre if needed for a warmer tone
Result: ~67% Burnt Sienna + 22% Black + 11% Red
Example 2: Creating Sage Green
Problem: Mix sage green (#87AE73) from available colors.
Solution: Start with Sap Green as the base\nAdd Titanium White to lighten to sage level\nAdd a tiny bit of Yellow Ochre for warmth\nRatio: 4 parts Sap Green, 5 parts White, 1 part Yellow Ochre\nSage green is a muted, desaturated green — the white does the heavy lifting
Result: ~40% Sap Green + 50% White + 10% Yellow Ochre
Frequently Asked Questions
How does paint mixing work?
Paint mixing follows subtractive color theory — each pigment absorbs (subtracts) certain wavelengths of light and reflects others. When you mix two colors, the result absorbs wavelengths from both paints, producing a darker, less saturated color. This is different from light mixing (additive), where combining colors gets brighter. Key principles: Red + Yellow = Orange, Blue + Yellow = Green, Red + Blue = Purple. Adding white creates tints, adding black creates shades, and adding the complementary color creates muted, earth-tone variations.
How do I estimate paint coverage for a room?
One gallon covers approximately 350-400 square feet per coat. Calculate wall area by multiplying perimeter by ceiling height, then subtract window and door openings. Most jobs need two coats, so divide total area by 175-200 per gallon. Add 10% for touch-ups and waste.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
Does Paint Mixing Calculator work offline?
Once the page is loaded, the calculation logic runs entirely in your browser. If you have already opened the page, most calculators will continue to work even if your internet connection is lost, since no server requests are needed for computation.
What inputs do I need to use Paint Mixing Calculator accurately?
Each field is labelled with the required unit (metric or imperial). Gather your source values before starting — for example, a weight measurement in kilograms, a distance in metres, or a dollar amount — and enter them exactly as measured. The formula section on this page lists every variable and explains what each represents.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy