How many carbs should I eat per day?

Start with maintenance calories (BMR × activity), then apply a carb percentage. Default male (25 y, 180 cm, 60 kg, light activity, 50% carbs): BMR 1605 × 1.375 = 2207 kcal/day → 50% = 276 g carbs (1104 kcal). Institute of Medicine minimum: 130 g/day for adults — this profile meets it. Female (30 y, 165 cm, 55 kg, moderate): 1861 kcal → 233 g at 50%.

How do you calculate daily carbohydrate intake?

Step 1 — BMR (Mifflin-St Jeor): men 10W + 6.25H − 5A + 5; women −161 instead of +5 → 1605 kcal. Step 2 — TDEE = BMR × activity → 2207 kcal. Step 3 — Carb kcal = TDEE × carb % → 1104 kcal. Step 4 — Grams = carb kcal ÷ 4 → 276 g. Worked: 2207 × 0.50 ÷ 4 = 276 g. Open Settings to try 40%, 55%, or 65% AMDR-style splits.

What percentage of calories should come from carbohydrates?

US Acceptable Macronutrient Distribution Range (AMDR) for carbs is often cited as 45–65% of calories. This tool defaults to 50%: 276 g on 2207 kcal. Same TDEE at 40% = 221 g; at 55% (endurance example) = 342 g on 2488 kcal active. Very low-carb diets (under 130 g or under ~26% of 2,000 kcal) are a separate clinical choice — not automatically better for everyone.

What is the minimum carbohydrate intake per day?

The Institute of Medicine sets an RDA of 130 g/day for adults — enough glucose for the brain and red blood cells. Default result 276 g is well above that. At 40% carbs on 2207 kcal you still get 221 g. Going below 130 g without medical supervision can affect training performance, fiber intake, and micronutrient variety.

How many carbs per kg of body weight do athletes need?

Sports nutrition often uses g/kg: ~3–5 g/kg general, 5–7 g/kg moderate training, 6–10 g/kg endurance blocks. At 60 kg and 50% of 2207 kcal you get 4.6 g/kg (276 g). Athlete band for 60 kg: 300–420 g at 5–7 g/kg — higher than percent-only math during heavy training. Very active same stats: 2769 kcal → 346 g (50%).

How does activity level affect carb needs?

Higher activity raises TDEE, so gram targets rise even at the same carb %. Same 60 kg male, Mifflin BMR 1605: light ×1.375 = 2207 kcal → 276 g carbs; very active ×1.725 = 2769 kcal → 346 g (+70 g vs light). Carbs fuel glycogen for repeated efforts — endurance days may need the 55–65% band (342 g on active multiplier).

Should I use Mifflin-St Jeor or Katch-McArdle for carb targets?

Mifflin-St Jeor is the default for most adults. Same profile: Mifflin BMR 1605 → 276 g carbs. Katch-McArdle at 20% body fat: BMR 1407 → TDEE 1935 kcal → 242 g carbs (−34 g vs Mifflin here). Katch helps lean lifters when body fat % is accurate; otherwise Mifflin is safer.

How many calories are in carbohydrates?

Carbohydrates provide 4 kcal per gram (same as protein; fat is 9 kcal/g). Your 276 g carbs = 1104 kcal from carbs on a 2207 kcal diet (~50%). Remaining calories go to protein and fat — use our macro calculator to split all three from one calorie target.

What are good carbs vs carbs to limit?

Prioritize fiber-rich whole grains, beans, fruit, and vegetables — they hit gram targets with vitamins and satiety. Rough portions: 1 cup cooked brown rice ~45 g carbs; medium banana ~27 g. Limit sugary drinks, candy, and refined flour as primary fuel if managing blood sugar or hunger. Gram count alone does not distinguish quality — 276 g from oats and vegetables beats 276 g from soda, even if calories match.

Can I lose weight on a high-carb diet?

Weight change follows calorie balance, not carb % alone. Maintenance here is 2207 kcal; a −500 kcal/day cut ≈ 1,707 kcal → ~50% carbs ≈ 213 g carbs if you keep the same ratio. You can also lower carb % (40% on cut = 221 g at maintenance calories) while raising protein via our protein calculator — muscle retention matters more than avoiding all carbs.

How does this relate to the macro and calorie calculators?

This tool isolates carbs from TDEE. Our calorie calculator gives maintain/lose/gain kcal; macro calculator splits protein, carbs, and fat together. Example chain: TDEE 2207 kcal → protein ~1.2–1.8 g/kg (72–108 g for 60 kg) → remaining calories to carbs and fat. Fiber target: see our fiber intake calculator for grams beyond total carbs.

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TDEE · AMDR · grams/day

Carbohydrate Calculator — Daily Carbs (g) from Calories & Activity

Free carbohydrate calculator: find how many carbs per day in grams from your TDEE (BMR × activity) and carb % of calories. Checks the 130 g adult minimum. Pair with our macro calculator for full protein and fat splits.

Last updated: May 24, 2026

Carb grams from 40–65% of TDEE (adjustable)

Mifflin-St Jeor or Katch-McArdle BMR

IOM 130 g/day minimum check

Need full macros from the same calories? Macro calculator

Carbohydrate Calculator

Daily carb grams from your TDEE (BMR × activity) and carb percentage of calories.

Unit System

Age

Ages 18–80

Gender

Height

Weight

Activity Level

Carbohydrate Results

TDEE (maintenance calories)

2,207 kcal/day

BMR 1605 × 1.375

Carbohydrates

276 g/day

50% of calories (1,104 kcal) · 4.6 g/kg

40% carbs

221 g

55% carbs

303 g

IOM minimum: 130 g/day for adults — you are at or above this floor (276 g).

• 4 kcal per gram of carbohydrate
• AMDR often cited as 45–65% of calories (US guidelines)
• Athlete range ~300–420 g at 5–7 g/kg

What This Carbohydrate Calculator Shows

TDEE

BMR × 1.375 light activity

2,207

kcal/day maintenance

Carbs (50%)

1,104 kcal from carbs

276 g

4.6 g/kg body weight

AMDR snapshot

40% / 55% on same TDEE

221 g – 303 g

Min 130 g (IOM)

Quick examples (live)

Male · light · 50%

276 g

Female · moderate

233 g

Very active · 50%

346 g

40% carbs (cut-style)

221 g

Carbohydrate Formula

BMR = Mifflin-St Jeor (or Katch-McArdle)
TDEE = BMR × activity multiplier
Carb g = (TDEE × carb %) ÷ 4

Worked: BMR 1605 × 1.375 = 2207 kcal. 2207 × 50% ÷ 4 = 276 g/day. At 40%: 221 g · at 65%: 359 g.

Activity Multipliers

Level	× BMR	Description	Carbs @ 50% (BMR 1605)
Sedentary	×1.2	Little or no exercise	241 g (1926 kcal)
Light	×1.375	Exercise 1–3 days/week	276 g (2207 kcal)
Moderate	×1.465	Exercise 4–5 days/week	294 g (2351 kcal)
Active	×1.55	Daily or intense 3–4×/week	311 g (2488 kcal)
Very active	×1.725	Intense 6–7 days/week	346 g (2769 kcal)
Extra active	×1.9	Hard daily training or physical job	381 g (3050 kcal)

AMDR Carbohydrate Percentages

% of calories	Use case	Grams @ 2207 kcal
40%	Lower end of AMDR; sometimes used for moderate fat-loss phases	221 g
45–50%	Balanced default in this calculator; fits many active adults	276 g
55%	Higher carb for endurance training or refeed days	303 g
65%	Upper AMDR; endurance athletes during heavy blocks	359 g

Carbs by Body Weight (g/kg)

Population	g/kg/day	Note	At 60 kg
General / light activity	3–5	RDA context; minimum 130 g absolute	180–300 g
Moderate training	5–7	ACSM-style fueling for regular exercisers	300–420 g
Endurance / heavy training	6–10	Glycogen loading; match to session volume	360–600 g

This calculator at 50% of TDEE gives 276 g (4.6 g/kg) — compare to athlete bands above.

Carbohydrate Types (Quick Reference)

Sugars (simple)

Fast-absorbing

Fruit, dairy lactose, sports gels — useful around training; limit as main daily source.

Starches (complex)

Slower energy release

Rice, oats, potatoes, legumes — backbone for most 276 g/day targets.

Fiber

Not fully counted like starch

Vegetables, whole grains, beans — track separately with our fiber calculator.

Sample Carb Portions

Food	Approx. carbs
Cooked brown rice (1 cup)	~45 g carbs
Medium banana	~27 g carbs
2 slices whole wheat bread	~24 g carbs
Medium sweet potato	~26 g carbs
Cooked oatmeal (1 cup)	~27 g carbs

Worked Example

Male · 25 y · 180 cm · 60 kg · light activity

Mifflin-St Jeor · 50% carbs

BMR = 10(60) + 6.25(180) − 5(25) + 5 = 1605 kcal

TDEE = 1605 × 1.375 = 2207 kcal

Carbs = 2207 × 0.50 ÷ 4 = 276 g/day

US equivalent (5′10″, 160 lb): 295 g carbs on 2361 kcal TDEE.

Limitations

Uses TDEE estimate from BMR × activity — real needs vary ±10–15%
Does not diagnose diabetes, celiac, or keto medical protocols
Percent-of-calories method ignores per-meal timing around workouts unless you plan manually
Quality matters: fiber-rich whole foods vs refined sugar affect health beyond gram totals
Athletes may need g/kg targets above % of calories — compare both columns in our tables

Frequently Asked Questions

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TDEE · AMDR · grams/day

Carbohydrate Calculator — Daily Carbs (g) from Calories & Activity

Last updated: May 24, 2026

Carb grams from 40–65% of TDEE (adjustable)

Mifflin-St Jeor or Katch-McArdle BMR

IOM 130 g/day minimum check

Need full macros from the same calories? Macro calculator

Carbohydrate Calculator

Daily carb grams from your TDEE (BMR × activity) and carb percentage of calories.

Unit System

Age

Ages 18–80

Gender

Height

Weight

Activity Level

Carbohydrate Results

TDEE (maintenance calories)

2,207 kcal/day

BMR 1605 × 1.375

Carbohydrates

276 g/day

50% of calories (1,104 kcal) · 4.6 g/kg

40% carbs

221 g

55% carbs

303 g

IOM minimum: 130 g/day for adults — you are at or above this floor (276 g).

• 4 kcal per gram of carbohydrate
• AMDR often cited as 45–65% of calories (US guidelines)
• Athlete range ~300–420 g at 5–7 g/kg

What This Carbohydrate Calculator Shows

TDEE

BMR × 1.375 light activity

2,207

kcal/day maintenance

Carbs (50%)

1,104 kcal from carbs

276 g

4.6 g/kg body weight

AMDR snapshot

40% / 55% on same TDEE

221 g – 303 g

Min 130 g (IOM)

Quick examples (live)

Male · light · 50%

276 g

Female · moderate

233 g

Very active · 50%

346 g

40% carbs (cut-style)

221 g

Carbohydrate Formula

BMR = Mifflin-St Jeor (or Katch-McArdle)
TDEE = BMR × activity multiplier
Carb g = (TDEE × carb %) ÷ 4

Worked: BMR 1605 × 1.375 = 2207 kcal. 2207 × 50% ÷ 4 = 276 g/day. At 40%: 221 g · at 65%: 359 g.

Activity Multipliers

Level	× BMR	Description	Carbs @ 50% (BMR 1605)
Sedentary	×1.2	Little or no exercise	241 g (1926 kcal)
Light	×1.375	Exercise 1–3 days/week	276 g (2207 kcal)
Moderate	×1.465	Exercise 4–5 days/week	294 g (2351 kcal)
Active	×1.55	Daily or intense 3–4×/week	311 g (2488 kcal)
Very active	×1.725	Intense 6–7 days/week	346 g (2769 kcal)
Extra active	×1.9	Hard daily training or physical job	381 g (3050 kcal)

AMDR Carbohydrate Percentages

% of calories	Use case	Grams @ 2207 kcal
40%	Lower end of AMDR; sometimes used for moderate fat-loss phases	221 g
45–50%	Balanced default in this calculator; fits many active adults	276 g
55%	Higher carb for endurance training or refeed days	303 g
65%	Upper AMDR; endurance athletes during heavy blocks	359 g

Carbs by Body Weight (g/kg)

Population	g/kg/day	Note	At 60 kg
General / light activity	3–5	RDA context; minimum 130 g absolute	180–300 g
Moderate training	5–7	ACSM-style fueling for regular exercisers	300–420 g
Endurance / heavy training	6–10	Glycogen loading; match to session volume	360–600 g

This calculator at 50% of TDEE gives 276 g (4.6 g/kg) — compare to athlete bands above.

Carbohydrate Types (Quick Reference)

Sugars (simple)

Fast-absorbing

Fruit, dairy lactose, sports gels — useful around training; limit as main daily source.

Starches (complex)

Slower energy release

Rice, oats, potatoes, legumes — backbone for most 276 g/day targets.

Fiber

Not fully counted like starch

Vegetables, whole grains, beans — track separately with our fiber calculator.

Sample Carb Portions

Food	Approx. carbs
Cooked brown rice (1 cup)	~45 g carbs
Medium banana	~27 g carbs
2 slices whole wheat bread	~24 g carbs
Medium sweet potato	~26 g carbs
Cooked oatmeal (1 cup)	~27 g carbs

Worked Example

Male · 25 y · 180 cm · 60 kg · light activity

Mifflin-St Jeor · 50% carbs

BMR = 10(60) + 6.25(180) − 5(25) + 5 = 1605 kcal

TDEE = 1605 × 1.375 = 2207 kcal

Carbs = 2207 × 0.50 ÷ 4 = 276 g/day

US equivalent (5′10″, 160 lb): 295 g carbs on 2361 kcal TDEE.

Limitations

Uses TDEE estimate from BMR × activity — real needs vary ±10–15%
Does not diagnose diabetes, celiac, or keto medical protocols
Percent-of-calories method ignores per-meal timing around workouts unless you plan manually
Quality matters: fiber-rich whole foods vs refined sugar affect health beyond gram totals
Athletes may need g/kg targets above % of calories — compare both columns in our tables