Oxalate Intake Calculator

Free oxalate calculator — estimate your daily oxalate intake from common foods to help lower calcium oxalate kidney stone risk. A quick, practical tool for stone prevention.

Last updated: 2026-07-09

Oxalate is a natural compound found in many plant foods. In people prone to calcium oxalate stones — the most common type — high urinary oxalate can raise the risk of forming new stones.

This calculator helps you estimate your rough daily oxalate intake from common foods. Enter the number of servings you typically eat, and the tool adds up approximate oxalate values to show whether your intake falls in a low, moderate, or high range.

What This Calculator Can and Cannot Do

  • Can: Give you a general sense of whether your dietary oxalate intake is low, moderate, or high.
  • Can: Help you identify which foods contribute the most oxalate to your diet.
  • Cannot: Measure your actual urinary oxalate — only a 24-hour urine test ordered by your doctor can do that.
  • Cannot: Account for individual variation in oxalate absorption, which depends on gut health, calcium intake, and other factors.
  • Cannot: Replace personalized medical advice from your urologist or registered dietitian.

For a complete at-a-glance reference of oxalate levels in common foods, see our oxalate food chart. For practical guidance on which foods to choose, see our guide to foods low in oxalate.

Estimate Daily Oxalate

Cooked spinach (½ cup)
~750 mg per serving
Almonds (1 oz)
~122 mg per serving
Peanuts (1 oz)
~27 mg per serving
Sweet potato (1 med)
~40 mg per serving
Baked potato (1 med)
~97 mg per serving
Beets (½ cup)
~76 mg per serving
Rhubarb (½ cup)
~540 mg per serving
Dark chocolate (1 oz)
~65 mg per serving
Black tea (1 cup)
~14 mg per serving
Whole wheat bread (1 slice)
~16 mg per serving
Raspberries (½ cup)
~25 mg per serving
Okra (½ cup)
~57 mg per serving
Kidney Stone Prevention Diet
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Kidney Stone Prevention Diet

Practical dietary guidance to help reduce kidney stone risk — track oxalate, calcium, sodium, and hydration in real foods.

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Frequently Asked Questions

Is a low-oxalate diet right for everyone?+
No. It is most useful for people with recurrent calcium oxalate stones and confirmed high urinary oxalate. Ask your urologist or dietitian.
Does cooking change oxalate?+
Boiling and discarding the water can reduce oxalate in some vegetables. Steaming and roasting have less impact.
What is a low-oxalate target?+
Many clinicians target under 100 mg of oxalate per day for stone formers who need to reduce oxalate.
Should I cut all high-oxalate foods?+
Not necessarily. Pairing oxalate foods with calcium-rich foods at the same meal binds oxalate in the gut and reduces absorption.

Medical Disclaimer

This article is for educational and informational purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult your physician, registered dietitian, or other qualified healthcare provider with any questions you may have regarding a medical condition or dietary changes.