Quick Conversion Answer
If youve ever wondered 60mg Armour thyroid equals how much levothyroxine? the short answer is roughly 88g to 100g of levothyroxine. In plain English, one grain (about 60mg) of desiccated thyroid is generally comparable to the dose youd take of Synthroid or levothyroxine tablets. Below is a quick cheatsheet for the most common numbers youll see:
- 30mg Armour 44g levothyroxine
- 60mg Armour 88100g levothyroxine
- 90mg Armour 132150g levothyroxine
These figures are a solid starting point, but remember your body may need a little more or a little less. Think of it as a rough road map, not a final destination.
Science Behind Doses
How Desiccated Thyroid Is Measured
Desiccated thyroid (DT) the fancy name for Armour Thyroid is measured in grains. One grain equals about 60mg of the raw animal thyroid material, which contains both T4 (thyroxine) and T3 (triiodothyronine). The classic conversion most clinicians quote is:
1 grain 38g T4 + 9g T3.
That little nugget of information explains why DT feels different from pure levothyroxine, which is 100% T4.
Why Levothyroxine Isnt a StraightLine Swap
Levothyroxine (Synthroid, Levoxyl, etc.) is a synthetic form of T4 only. Your body must convert that T4 into T3, the hormone that actually powers up many of your cells. Some people are efficient converters; others are not. When you move to Armour, youre getting T3 right away, which can smooth out symptoms for those who struggle with the conversion step.
What the Clinical Studies Say
Several patientfocused studies have explored this conversion issue. For example, a found that about 30% of respondents who switched to DT reported feeling more energetic after six weeks, while a smaller highlighted the need for careful lab monitoring because overreplacement can happen quickly with the added T3.
Conversion Tools
Using a Thyroid Conversion Calculator
Online calculators do the heavy lifting for you. Simply type your current levothyroxine dose, choose convert to desiccated thyroid, and the tool will spit out an approximate grain amount. Reliable options include the calculators on and the health hub. Remember to doublecheck the result with your doctor calculators are great guides but not prescription pads.
Manual Conversion Charts You Can Print
If you love a good spreadsheet, a printable chart can sit on your fridge. Below is a compact version you can copy into Excel:
| Armour (mg) | Approx. Levothyroxine (g) | T3 Content * |
|---|---|---|
| 30mg | 44g | 5% |
| 60mg | 88100g | 10% |
| 90mg | 132150g | 15% |
*The % column shows the relative amount of T3 in the dose; its a reminder that DT isnt just more of the same as levothyroxine.
Factors Influencing Dose
Body Weight & Age
Kids and lighter adults often need a weightbased approach. The suggests roughly 1.6g levothyroxine per kilogram of ideal body weight, while DT tends to be prescribed in wholegrain increments, which can feel chunkier.
Underlying Thyroid Condition
People with Hashimotos thyroiditis sometimes report better symptom control with Armour because the added T3 can bypass the sluggish conversion that inflammation sometimes causes. A notes that the evidence is mixed, but many patients find the natural hormone blend comforting. If youre exploring treatment options for primary hypothyroidism, discuss pros and cons of DT vs T4-only therapy with your clinician.
Medication Interactions & GI Factors
Calcium, iron, and protonpump inhibitors can all blunt levothyroxine absorption. Armour isnt immune either, but because it contains T3, the overall impact may feel less dramatic. If you have bariatric surgery or chronic gut issues, discuss timing and dosage with your endocrinologist.
Genetic Polymorphisms
A handful of studies point to DIO2 gene variants that affect T4toT3 conversion. While routine testing isnt standard practice yet, the science is nudging us toward more personalized thyroid therapy in the near future.
Risks and Benefits
Potential Benefits
- More natural hormone profile: You get both T4 and T3, which can smooth out mood swings and energy dips.
- Fewer dosage adjustments: Some patients find their labs stabilize sooner after switching.
- Personal sense of control: For many, taking a wholethyroid product feels more holistic.
Possible Risks & SideEffects
- Overreplacement: Too much T3 can cause palpitations, anxiety, or even bone loss over time.
- Underreplacement: If the grain dose is too low, fatigue and weight gain can creep back in.
- Allergic reactions: Rare, but the animalderived product can trigger sensitivities in some people.
Monitoring Plan
A sensible monitoring schedule looks like this:
- Baseline labs: TSH, free T4, free T3.
- First followup: 6 weeks after any dose change.
- Subsequent checks: Every 36 months, or sooner if symptoms shift.
Keep a symptom journal alongside your labs youll thank yourself later.
Safe Switching Steps
Talk to Your Provider
Never make the jump on your own. A shareddecision meeting with an endocrinologist (or at least a knowledgeable primarycare doc) ensures you get a written plan, dosage calculations, and a safety net for any unexpected changes.
Gradual Taper vs. Immediate Switch
Most clinicians recommend a partial overlap approach:
- Day1: Reduce levothyroxine by 25%.
- Day2: Add the calculated Armour grain amount (often 30% of the projected full dose).
- Every 46 weeks: Reevaluate labs and symptoms, then adjust upward or downward in 12.5% increments.
This method smooths the transition and gives your body time to adapt to the added T3.
Track Symptoms & Labs
Consider a simple spreadsheet with columns for date, dose, TSH, free T4, free T3, and a quick energy rating from 110. Youll spot trends faster than youd think.
When to Seek Immediate Help
If you notice rapid heartbeats, tremors, heat intolerance, or sudden weight loss, call your provider right away those could be signs of overt hyperthyroidism.
Common Conversion Questions
How Much Levothyroxine Equals 60mg Armour?
The ruleofthumb is about 88g to 100g, but the exact number depends on your age, weight, and how well your body converts T4 to T3.
Is There a Free Online Calculator?
Yes the and the tool both let you toggle between levothyroxine and DT doses for free.
Can I Switch Back If It Doesnt Work?
Absolutely. Most doctors will revert you to your original levothyroxine dose, often with a brief washout period to let the added T3 clear from your system.
Does Armour Work Better for Hashimotos?
The research is mixed, but many patients with autoimmune thyroid disease report feeling better on Armour because the immediate T3 can compensate for a sluggish conversion pathway.
How Much Levothyroxine Equals 90mg Armour?
Roughly 132g to 150g**. Again, think of this as a starting ballpark your doctor will finetune it.
What About Pediatric Dosing?
Kids are usually dosed by weight, using a formula like 1.6g levothyroxine per kilogram. When converting to DT, clinicians often start with a halfgrain and adjust from there.
Bottom Line Summary
In a nutshell, the Armour thyroid vs levothyroxine conversion is not an exact science, but the rough equivalence of one grain (60mg) to about 88100g of levothyroxine gives you a solid foothold. Your personal dose will be shaped by weight, age, underlying conditions such as Hashimotos, medication interactions, and even your unique genetics.
Use a reputable thyroid conversion calculator or printable chart to get a starting point, then partner with a knowledgeable provider for lab checks and symptom tracking. Whether you stay on pure levothyroxine, switch to Armour, or try a hybrid approach, the ultimate goal is the same: feeling balanced, energetic, and in control of your health.
Whats your experience with thyroid medication swaps? Have you tried a conversion calculator or kept a symptom journal? Share your story in the comments you might help someone else find the confidence to make a safe, informed change.
