How to Grade Mango Quality (Brix, Size, Defects)
Founder, MMA Farms — 3rd-generation Multan mango grower
Mango grading is a 4-axis system: Brix (sugar), size class, defect count, and ripeness stage. Here's how export-grade and premium retailers grade Pakistani mangoes — and how you can apply the same checks at home.
You'll Need
- · Mangoes (10+ for sample grading)
- · Digital kitchen scale
- · Distilled water
Tools
- · Digital Brix refractometer ($20-40 on Amazon)
- · Sharp knife
- · Caliper (optional)
Step-by-Step
- 1
Test Brix (sugar) with a refractometer
Cut a small slice of pulp, squeeze juice on the refractometer prism, close the cover, point at light, read the line. Premium grade is Brix 18+. Sindhri scores 22-24 (top of class). Chaunsa 20-22. Tommy Atkins 12-14 (commodity grade).
- 2
Size sort by weight
Use a digital scale. Class A: 300g+ (export gift grade). Class B: 200-300g (premium retail). Class C: 150-200g (standard retail). Class D: under 150g (juice/processing). Anwar Ratol is genetically small — grade it on its own scale.
- 3
Defect check — visual inspection
Acceptable: 1-2 small lenticel spots, minor russeting near stem. Reject: any soft mushy spot, sap burn streaks, hail damage dimples, anthracnose dark spots, fruit fly puncture. Defect rate over 5% drops the grade.
- 4
Ripeness stage classification
Stage 1 (mature green): firm, full-size, just before color change — used for shipping. Stage 2 (color-break): 30% color shift — retail-ready. Stage 3 (ripe): 80% color, soft to thumb, eat-ready. Stage 4 (peak): 100% color, very soft — eat today. Stage 5 (over-ripe): wrinkled skin — process only.
- 5
Document the grade
Final grade combines all four axes. Example: Sindhri Class A, Brix 23, 0% defects, Stage 1 = export-premium. Sindhri Class C, Brix 18, 5% defects, Stage 4 = local-standard. Premium D2C brands sell only A-grade Stage 2-3.
FAQs
What's a good Brix score for mangoes?
12-14: commodity. 15-17: standard. 18-20: premium. 20-22: super-premium. 22+: rare/heirloom (Sindhri, Anwar Ratol). The world's sweetest commercial mangoes hit Brix 22-24.
Is a digital refractometer worth buying?
Yes if you eat 50+ mangoes per season — $20-40 device pays for itself in identifying which farms/varieties consistently hit high Brix. Use it at the source (farm market, exporter) to qualify suppliers.
How do export-grade and retail-grade differ?
Export-grade is harder (Stage 1), single-variety, sized 250g+, defect-free, in branded boxes. Retail-grade is mixed, 150-300g, allows 5% minor defects. Premium D2C (like MMA Farms) is export-grade quality sold direct to consumer at retail prices.
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