How Long to Bake Salmon
The single biggest variable in baking salmon is not weight, it is thickness. Heat in an oven moves into a flat slab of fish from the top and bottom, so a 1.5-inch fillet takes far longer than a 0.5-inch tail piece of the same weight. As a working baseline, a 1-inch fillet taken straight from the fridge needs about 13 minutes at 400 F to reach a moist medium. Every quarinch of extra thickness adds roughly 3 minutes, while dropping the oven to 350 F stretches the time by about 30 percent and pushing it to 450 F cuts it by a fifth. The calculator above layers all of those factors together instead of giving you the vague "12 to 15 minutes" you see on most recipe cards.
Pull Temperature Beats the Clock
Salmon is done by temperature, not by time, and the difference between perfect and chalky is only about 15 degrees. The USDA calls 145 F safe, but most chefs pull salmon between 120 and 130 F because the fish keeps cooking after it leaves the oven. That carryover rise is real: a thick fillet climbs another 5 F while it rests, so pulling at 125 F lands you right at a flaky 130 F on the plate. An instant-read thermometer slipped into the thickest part is the only way to nail this consistently.
Bake min = 13 x thickness(in) x ovenFactor x donenessFactor x startFactor
Why Resting Matters
Pulling salmon a few degrees early and letting it rest tented under foil for 3 to 5 minutes does two things: it lets carryover heat finish the center gently and it lets the muscle fibers relax so juices redistribute instead of running out the moment you cut in. Skip the rest and you both overshoot your target doneness and lose moisture to the plate. A 1.5-inch fillet pulled at 125 F and rested 5 minutes will read close to 130 F and stay silky, while the same fillet left in the oven to "hit 130" comes out closer to 140 F and dry.
Frequently Asked Questions
What temperature should I bake salmon at?
400 F is the all-around best for most fillets because it cooks fast enough to keep the fish moist while giving the top a little color. Use 350 to 375 F if you want a gentler, more forgiving bake for thick center cuts, or 425 to 450 F when you want a faster cook with a lightly crisped surface.
How do I know when baked salmon is done?
The reliable way is an instant-read thermometer in the thickest part: 120 F for medium-rare, 125 to 130 F for moist medium, and 140 to 145 F for fully flaky and well-done. Visually, salmon is ready when it flakes with gentle pressure and the flesh turns from translucent to opaque, but color alone is easy to overshoot.
Why does my baked salmon come out dry?
Almost always because it was cooked past about 135 F internal, where the proteins squeeze out moisture and the texture turns chalky. Pull the fish 5 to 10 degrees below your target, account for carryover heat during the rest, and a thin brush of oil or butter on top helps buffer thin tail sections from overcooking.
Should I bake salmon covered or uncovered?
Uncovered is standard for baked salmon because it lets the surface dry slightly and pick up a bit of browning. Cover loosely with foil only if you are baking a very thick side, want to trap moisture for a softer poached-style texture, or are reheating leftovers without drying them out.
Practical Guide for Baked Salmon Time & Temp Calculator
Measure thickness, not weight. Recipes that tell you a number of minutes per pound fall apart because a folded thick fillet and a thin spread-out one can weigh the same yet cook completely differently. Stand a fillet on its side and eyeball the thickest section against a ruler; most supermarket fillets run 0.75 to 1.25 inches, while a center-cut from a whole side can hit 1.5 inches or more. Feed that single measurement into the calculator and the per-quarter-inch scaling does the rest.
Let carryover do the last few degrees. Salmon at oven temperature still has heat stored in its surface, and that heat keeps driving inward after you pull the pan. For a thin fillet expect about a 3 F rise during the rest, and for a thick center-cut closer to 5 F. That is why every doneness option in this tool gives you a pull temp that is lower than the final target: you are aiming to land at the finish line during the rest, not while it is still in the oven.
Even out the cook before it starts. A 20-minute counter rest knocks the chill off the center so the outside does not overcook while the middle catches up, which is why the calculator trims time for room-temperature fish. For uneven fillets, tuck the thin tail end under itself to build an even slab, and bring the whole piece to a consistent thickness when you can. Pat the surface dry before baking so the top sets and lightly browns instead of steaming.
Quick Checklist
- Measure the thickest point of the fillet with a ruler before you set the time.
- Use an instant-read thermometer and pull at the temp shown, not by the clock alone.
- Tent loosely with foil and rest 3 to 5 minutes so carryover finishes the center.
- Tuck thin tail sections under to make an even slab so nothing overcooks.