US to Canadian Canning Conversions: Jars, Units, Terms
To use a US canning recipe in Canada, translate the jar sizes and vocabulary but never change the acid, the jar size relative to the recipe, or the processing time. A US half-pint is the Canadian 250 mL jar, a US pint is 500 mL, and a US quart is 1 litre. US 'lids' or 'flats' are Canadian SNAP lids, and US 'rings' are bands. For temperature, 212 °F is 100 °C (a boiling-water bath), 240 °F is about 116 °C (pressure canning), and 180 °F is about 82 °C (a simmer). One catch: a US half-pint is technically 236 mL, so some Canadian jars labelled 250 mL actually hold 236 mL — the difference is small but it is why you should always match the jar size the recipe was tested for rather than swapping up to a bigger jar.
Most canning recipes online are American. The method is the same on both sides of the border, but the jar labels, the units, and even some of the words are different — and a couple of those differences matter for safety, not just translation. This is the cheat sheet.
The one rule that overrides everything below: translate the vocabulary and units, but never change the acid or use a bigger jar than the recipe was tested for. Acid and jar size are safety, not preference.
Jar sizes
| US name | US volume | Canadian (Bernardin) equivalent |
|---|---|---|
| Half-pint | 8 oz / 236 mL | 250 mL |
| Pint | 16 oz / 473 mL | 500 mL |
| Pint-and-a-half | 24 oz / 710 mL | 750 mL (less common) |
| Quart | 32 oz / 946 mL | 1 L |
| Half-gallon | 64 oz / 1.89 L | 2 L (juice only) |
The 236 mL gotcha
A US half-pint is 236 mL, not a clean 250 mL. Some Canadian jars are direct translations of the US 8-oz jar and actually hold 236 mL even when the box says “250 mL.” The volume difference is small, but it’s the reason for this rule: use the jar size your recipe was tested with, and follow that recipe’s headspace and processing time. Don’t assume every “half-pint” jar is identical, and don’t move up to a larger jar to save effort — a bigger jar needs a longer, separately-tested processing time.
Lids, bands, and vocabulary
| US term | Canadian term |
|---|---|
| Lid / flat | SNAP lid |
| Ring / screw band | Band |
| Regular mouth | Regular mouth (same) |
| Wide mouth | Wide mouth (same) |
| Ball / Kerr jars | Bernardin (same parent company, Canadian brand) |
Both countries: the SNAP lid (the flat sealing disc) is single-use; the band is reusable. See can you reuse SNAP lids and Bernardin vs Mason vs Kerr jars.
Temperature (°F → °C)
These are exact physics conversions — safe to apply directly, no judgement involved:
| Fahrenheit | Celsius | Where it shows up |
|---|---|---|
| 212 °F | 100 °C | Boiling-water bath |
| 240 °F | ≈116 °C | Pressure canning (10–11 lb) |
| 250 °F | ≈121 °C | Pressure canning (15 lb) |
| 180 °F | ≈82 °C | Simmer (keeping jars hot) |
| 160 °F | ≈71 °C | Health Canada safe internal temp for meat/jerky |
| 145 °F | ≈63 °C | Warm-pack holding |
Volume and weight
| US measure | Metric |
|---|---|
| 1 US cup | 237 mL (note: a metric cup is 250 mL) |
| 1 tablespoon | ≈15 mL |
| 1 teaspoon | ≈5 mL |
| 1 fluid ounce | ≈30 mL |
| 1 pound | ≈454 g |
| 1 ounce (weight) | ≈28 g |
The cup catch: a US cup is 237 mL but a Canadian/metric cup is 250 mL — about a 5% difference. For most preserving recipes this is harmless (it scales the whole batch evenly), but if you’re measuring a ratio that affects acidity or set, use the recipe’s own cup standard consistently rather than mixing measuring sets.
Altitude (feet → metres)
US altitude tables are in feet; Canadian readers think in metres. The base threshold:
- 1,000 ft = 305 m — at or above this you must adjust processing.
Don’t apply a US altitude table directly — use the Canadian altitude-adjustment bands, which lay out the metric bands and the Canadian cities in each.
Pressure (PSI)
Pressure is the same unit on both sides — pounds per square inch (lb / PSI). A US recipe calling for 10 PSI means 10 lb on your Canadian gauge; 15 PSI means 15 lb. No conversion needed. The only thing to adjust for is altitude, which raises the pressure (not the time) — again per the Canadian bands, and per your canner’s manual.
What you must NOT change
When adapting any US recipe:
- Acid. Bottled lemon juice, vinegar (5% acidity), and citric acid amounts are the safety backbone. Never reduce them. US and Canadian tested recipes use the same acidification science.
- Jar size relative to the recipe. Use the translated equivalent — don’t size up.
- Processing time and altitude adjustment. Use the recipe’s time for its jar size, adjusted for your altitude band.
US authorities (USDA / NCHFP) and Canadian ones (Bernardin / Health Canada) agree on the underlying safety numbers. What differs is the vocabulary, the jar labelling, and the units — which is all this sheet exists to translate. When a US recipe and a Bernardin recipe disagree on a time or an acid amount, use the Bernardin figure — it’s tested for the jars and altitudes you’re actually using.
Next steps
- Canadian altitude adjustments — the metric bands by city
- Bernardin vs Mason vs Kerr jars — Canadian jar sizing explained
- Can you reuse Bernardin SNAP lids? — the single-use rule
- Can I water-bath can spaghetti sauce? — the acid rule, in case a US recipe tempts you to skip it
- Water-bath canning pillar — the full Canadian method
Frequently asked questions
What is a US pint in Canadian jar sizes?
A US pint (16 fluid ounces, 473 mL) maps to the Canadian 500 mL Bernardin jar. A US half-pint (8 oz, 236 mL) maps to the 250 mL jar, a US quart (32 oz, 946 mL) maps to the 1 litre jar, and a US half-gallon (1.89 L) maps to the 2 L jar. These are the standard substitutions Bernardin and Canadian recipes use. Match the recipe's jar size to its closest Canadian equivalent — don't move up to a larger jar, because processing time is tied to jar size.
Why is my 250 mL jar actually 236 mL?
Because some Canadian jars are direct translations of the US 8-ounce half-pint, which is 236 mL, not a clean 250 mL. Bernardin sells both shapes, and a jar marked '250 mL' may hold the squat 236 mL US-equivalent volume. The difference is small for filling, but it's the reason you should always use the jar size a recipe was tested with rather than assuming all 'half-pint' jars are identical. For headspace and processing time, follow the recipe's stated jar size.
How do I convert canning temperatures from Fahrenheit to Celsius?
The three that matter: 212 °F is 100 °C (a full boiling-water bath), 240 °F is about 116 °C (the standard pressure-canning temperature at 10–11 lb), and 180 °F is about 82 °C (a simmer, used for keeping jars hot). For jerky and meat safety, 160 °F is about 71 °C — Health Canada's safe internal temperature. These are exact physics conversions, not canning judgement calls, so they're safe to apply directly.
Can I just use a US canning recipe as-is in Canada?
Mostly yes for the method, with two hard rules. First, never change the acid (bottled lemon juice, vinegar, citric acid amounts) — that's what keeps the recipe safe, and US and Canadian tested recipes use the same acidification science. Second, use the jar size the recipe specifies, translated to its Canadian equivalent, and the recipe's processing time and altitude adjustment. US authorities (USDA/NCHFP) and Canadian ones (Bernardin/Health Canada) agree on the underlying safety numbers; what differs is the vocabulary and the jar labelling.
Sources
- Bernardin Complete Book of Home Preserving (latest edition)
- Health Canada — Food safety for home canning