Reviewed by Emily Carter, MSc, RD
Registered Dietitian & Hydration Research Specialist. Emily holds a Master of Science in Human Nutrition and has spent over a decade translating nutrition research into practical, evidence-based guidance for everyday health and athletic performance.
| --- | --- | |
|---|---|---|
| Active adult | 80–101 oz | 1.25–1.6 fills |
| Gym athlete | 101–118 oz | 1.6–1.8 fills |
| Sauna user | 118–169 oz | 1.8–2.6 fills |
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64 oz in Metric
| Imperial | Metric |
|---|---|
| 64 oz | 1,893 mL |
| 64 oz | 1.893 L |
| 64 oz | ~1.9 L |
For Canadians: 64 oz ≈ 2L, which is the lower end of daily recommended intake for adults.
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64 oz vs Other Bottle Sizes
| Size | Oz | For Daily 3L Target |
|---|---|---|
| 500 mL | 16.9 oz | 6 refills |
| 1L | 33.8 oz | 3 refills |
| 64 oz (1.9L) | 64 oz | 1.6 refills |
| Mammoth Mini 1.5L | 50.7 oz | 2 refills |
| Mammoth Mug 2.5L | 84.5 oz | 1.2 refills |
The Mammoth Mug 2.5L holds 32% more than a 64 oz bottle — and fits in one fill for most people's daily target.
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Who Is a 64 oz Bottle Right For?
Good fit:- Office workers with consistent access to a water source for one mid-day refill
- Casual gym-goers (1 session/day, moderate intensity)
- People transitioning from smaller bottles who want a manageable step up
- Athletes training 60+ minutes daily
- Sauna users (lose up to 800mL per 15 min session)
- Construction workers and outdoor labourers in summer
- Anyone consistently finishing their 64 oz before the day ends
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What 64 oz Bottles Are Available in Canada?
| Bottle | Material | Price | Notes |
|---|---|---|---|
| Hydro Flask 64oz | Stainless (insulated) | ~$80 CAD | Good insulation, heavy |
| Nalgene 48oz | Tritan | ~$20 CAD | Close to 64 oz |
| Stanley 64oz | Stainless (insulated) | ~$55 CAD | Wide availability |
| Mammoth Mug 2.5L | Tritan | ~$45 CAD | 84.5 oz — exceeds 64 oz |
| Mammoth Woolly | Stainless (insulated) | $89–99 CAD | 1.5L or 2.5L insulated option |
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🛒 Go Bigger Than 64 oz
The Mammoth Mug 2.5L holds 84.5 oz — 32% more than a 64 oz bottle. One fill covers most people's full daily target. BPA-free, DEHP-free Tritan. Available at Sport Chek and 300+ locations across Canada.
For cold water all day, the Mammoth Woolly keeps drinks cold 24+ hours with double-wall vacuum insulation in stainless steel.
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Frequently Asked Questions
How many liters is 64 oz?
64 oz = 1.893 liters. Round to 1.9L for practical use.
Is 64 oz of water a day enough?
For sedentary adults, 64 oz (1.893L) is at the lower end of adequate. Active people, athletes, and sauna users typically need 80–128 oz (2.4–3.8L) daily.
How many cups is 64 oz?
64 oz = 8 cups (at 8 oz per cup). The classic "8 glasses a day" recommendation equals exactly 64 oz.
How heavy is a full 64 oz water bottle?
64 oz of water weighs 1.9 kg (4.2 lbs). Add the bottle weight (varies by material) — a full stainless 64 oz bottle typically weighs 2.3–2.5 kg.
How many 64 oz water bottles should I drink a day?
For most active adults: 1.5–2 fills of a 64 oz bottle per day (96–128 oz total). For sedentary adults, 1 fill is the minimum.
Is a 64 oz bottle the same as a half gallon?
Yes — a US half gallon = 64 fluid ounces = 1.893 liters. The terms are interchangeable.
What is bigger — 64 oz or 2 liters?
2 liters (67.6 oz) is slightly larger than 64 oz (1.893L). The difference is about 113mL — less than half a cup.
How many 16 oz bottles equal 64 oz?
4 × 16 oz bottles = 64 oz = half gallon.
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- Half Gallon Water Bottle Guide
- How Many Oz in a Half Gallon?
- Gallon Water Bottle Guide
- Water Bottle Sizes Guide
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