diff --git a/app/vmselect/promql/eval.go b/app/vmselect/promql/eval.go
index 7786f6b86..1ab6b7c1b 100644
--- a/app/vmselect/promql/eval.go
+++ b/app/vmselect/promql/eval.go
@@ -835,7 +835,7 @@ func evalTime(ec *EvalConfig) []*timeseries {
 	timestamps := rv[0].Timestamps
 	values := rv[0].Values
 	for i, ts := range timestamps {
-		values[i] = float64(ts) * 1e-3
+		values[i] = float64(ts) / 1e3
 	}
 	return rv
 }
diff --git a/app/vmselect/promql/exec_test.go b/app/vmselect/promql/exec_test.go
index d645bcc2c..e7bf87a77 100644
--- a/app/vmselect/promql/exec_test.go
+++ b/app/vmselect/promql/exec_test.go
@@ -4823,10 +4823,10 @@ func TestExecSuccess(t *testing.T) {
 	})
 	t.Run(`integrate(time())`, func(t *testing.T) {
 		t.Parallel()
-		q := `integrate(time()*1e-3)`
+		q := `integrate(time()/1e3)`
 		r := netstorage.Result{
 			MetricName: metricNameExpected,
-			Values:     []float64{180, 220.00000000000003, 260, 300, 340.00000000000006, 380},
+			Values:     []float64{180, 220.00000000000003, 259.99999999999994, 300, 340.00000000000006, 380},
 			Timestamps: timestampsExpected,
 		}
 		resultExpected := []netstorage.Result{r}
diff --git a/app/vmselect/promql/rollup.go b/app/vmselect/promql/rollup.go
index 77f8792a7..a271757b1 100644
--- a/app/vmselect/promql/rollup.go
+++ b/app/vmselect/promql/rollup.go
@@ -670,7 +670,7 @@ func derivValues(values []float64, timestamps []int64) {
 			values[i] = prevDeriv
 			continue
 		}
-		dt := float64(ts-prevTs) * 1e-3
+		dt := float64(ts-prevTs) / 1e3
 		prevDeriv = (v - prevValue) / dt
 		values[i] = prevDeriv
 		prevValue = v
@@ -790,7 +790,7 @@ func linearRegression(rfa *rollupFuncArg) (float64, float64) {
 		n = 0
 	}
 	for i, v := range values {
-		dt := float64(timestamps[i]-tFirst) * 1e-3
+		dt := float64(timestamps[i]-tFirst) / 1e3
 		vSum += v
 		tSum += dt
 		tvSum += dt * v
@@ -803,7 +803,7 @@ func linearRegression(rfa *rollupFuncArg) (float64, float64) {
 	k := (n*tvSum - tSum*vSum) / (n*ttSum - tSum*tSum)
 	v := (vSum - k*tSum) / n
 	// Adjust v to the last timestamp on the given time range.
-	v += k * (float64(timestamps[len(timestamps)-1]-tFirst) * 1e-3)
+	v += k * (float64(timestamps[len(timestamps)-1]-tFirst) / 1e3)
 	return v, k
 }
 
@@ -1055,7 +1055,7 @@ func rollupTmin(rfa *rollupFuncArg) float64 {
 			minTimestamp = timestamps[i]
 		}
 	}
-	return float64(minTimestamp) * 1e-3
+	return float64(minTimestamp) / 1e3
 }
 
 func rollupTmax(rfa *rollupFuncArg) float64 {
@@ -1074,7 +1074,7 @@ func rollupTmax(rfa *rollupFuncArg) float64 {
 			maxTimestamp = timestamps[i]
 		}
 	}
-	return float64(maxTimestamp) * 1e-3
+	return float64(maxTimestamp) / 1e3
 }
 
 func rollupSum(rfa *rollupFuncArg) float64 {
@@ -1303,7 +1303,7 @@ func rollupDerivFast(rfa *rollupFuncArg) float64 {
 	vEnd := values[len(values)-1]
 	tEnd := timestamps[len(timestamps)-1]
 	dv := vEnd - prevValue
-	dt := float64(tEnd-prevTimestamp) * 1e-3
+	dt := float64(tEnd-prevTimestamp) / 1e3
 	return dv / dt
 }
 
@@ -1329,7 +1329,7 @@ func rollupIderiv(rfa *rollupFuncArg) float64 {
 			// So just return nan
 			return nan
 		}
-		return (values[0] - rfa.prevValue) / (float64(timestamps[0]-rfa.prevTimestamp) * 1e-3)
+		return (values[0] - rfa.prevValue) / (float64(timestamps[0]-rfa.prevTimestamp) / 1e3)
 	}
 	vEnd := values[len(values)-1]
 	tEnd := timestamps[len(timestamps)-1]
@@ -1353,7 +1353,7 @@ func rollupIderiv(rfa *rollupFuncArg) float64 {
 	}
 	dv := vEnd - vStart
 	dt := tEnd - tStart
-	return dv / (float64(dt) * 1e-3)
+	return dv / (float64(dt) / 1e3)
 }
 
 func rollupLifetime(rfa *rollupFuncArg) float64 {
@@ -1363,12 +1363,12 @@ func rollupLifetime(rfa *rollupFuncArg) float64 {
 		if len(timestamps) < 2 {
 			return nan
 		}
-		return float64(timestamps[len(timestamps)-1]-timestamps[0]) * 1e-3
+		return float64(timestamps[len(timestamps)-1]-timestamps[0]) / 1e3
 	}
 	if len(timestamps) == 0 {
 		return nan
 	}
-	return float64(timestamps[len(timestamps)-1]-rfa.prevTimestamp) * 1e-3
+	return float64(timestamps[len(timestamps)-1]-rfa.prevTimestamp) / 1e3
 }
 
 func rollupLag(rfa *rollupFuncArg) float64 {
@@ -1378,9 +1378,9 @@ func rollupLag(rfa *rollupFuncArg) float64 {
 		if math.IsNaN(rfa.prevValue) {
 			return nan
 		}
-		return float64(rfa.currTimestamp-rfa.prevTimestamp) * 1e-3
+		return float64(rfa.currTimestamp-rfa.prevTimestamp) / 1e3
 	}
-	return float64(rfa.currTimestamp-timestamps[len(timestamps)-1]) * 1e-3
+	return float64(rfa.currTimestamp-timestamps[len(timestamps)-1]) / 1e3
 }
 
 func rollupScrapeInterval(rfa *rollupFuncArg) float64 {
@@ -1390,12 +1390,12 @@ func rollupScrapeInterval(rfa *rollupFuncArg) float64 {
 		if len(timestamps) < 2 {
 			return nan
 		}
-		return float64(timestamps[len(timestamps)-1]-timestamps[0]) * 1e-3 / float64(len(timestamps)-1)
+		return (float64(timestamps[len(timestamps)-1]-timestamps[0]) / 1e3) / float64(len(timestamps)-1)
 	}
 	if len(timestamps) == 0 {
 		return nan
 	}
-	return (float64(timestamps[len(timestamps)-1]-rfa.prevTimestamp) * 1e-3) / float64(len(timestamps))
+	return (float64(timestamps[len(timestamps)-1]-rfa.prevTimestamp) / 1e3) / float64(len(timestamps))
 }
 
 func rollupChanges(rfa *rollupFuncArg) float64 {
@@ -1709,7 +1709,7 @@ func rollupIntegrate(rfa *rollupFuncArg) float64 {
 	var sum float64
 	for i, v := range values {
 		timestamp := timestamps[i]
-		dt := float64(timestamp-prevTimestamp) * 1e-3
+		dt := float64(timestamp-prevTimestamp) / 1e3
 		sum += 0.5 * (v + prevValue) * dt
 		prevTimestamp = timestamp
 		prevValue = v
diff --git a/app/vmselect/promql/rollup_test.go b/app/vmselect/promql/rollup_test.go
index 4bb596a2e..d8080685a 100644
--- a/app/vmselect/promql/rollup_test.go
+++ b/app/vmselect/promql/rollup_test.go
@@ -139,16 +139,16 @@ func TestDerivValues(t *testing.T) {
 
 	values = append([]float64{}, testValues...)
 	derivValues(values, testTimestamps)
-	valuesExpected = []float64{-8900, 1111.111111111111, -1916.6666666666665, 2538.461538461538, -1818.1818181818182, 3611.111111111111,
-		-43500, 1882.3529411764705, -666.6666666666666, 400, 0, 0}
+	valuesExpected = []float64{-8900, 1111.111111111111, -1916.6666666666665, 2538.4615384615386, -1818.1818181818182, 3611.1111111111113,
+		-43500, 1882.3529411764705, -666.6666666666667, 400, 0, 0}
 	testRowsEqual(t, values, testTimestamps, valuesExpected, testTimestamps)
 
 	// remove counter resets
 	values = append([]float64{}, testValues...)
 	removeCounterResets(values)
 	derivValues(values, testTimestamps)
-	valuesExpected = []float64{3400, 1111.111111111111, 1750, 2538.461538461538, 3090.909090909091, 3611.111111111111,
-		6000, 1882.3529411764705, 1777.7777777777776, 400, 0, 0}
+	valuesExpected = []float64{3400, 1111.111111111111, 1750, 2538.4615384615386, 3090.909090909091, 3611.1111111111113,
+		6000, 1882.3529411764705, 1777.7777777777778, 400, 0, 0}
 	testRowsEqual(t, values, testTimestamps, valuesExpected, testTimestamps)
 
 	// duplicate timestamps
@@ -914,7 +914,7 @@ func TestRollupFuncsNoWindow(t *testing.T) {
 		}
 		rc.Timestamps = getTimestamps(rc.Start, rc.End, rc.Step)
 		values := rc.Do(nil, testValues, testTimestamps)
-		valuesExpected := []float64{0, -2879.310344827587, 558.0608793686592, 422.84569138276544, 0}
+		valuesExpected := []float64{0, -2879.310344827587, 558.0608793686595, 422.84569138276544, 0}
 		timestampsExpected := []int64{0, 40, 80, 120, 160}
 		testRowsEqual(t, values, rc.Timestamps, valuesExpected, timestampsExpected)
 	})
diff --git a/app/vmselect/promql/transform.go b/app/vmselect/promql/transform.go
index 16ca9cc7f..f900b5199 100644
--- a/app/vmselect/promql/transform.go
+++ b/app/vmselect/promql/transform.go
@@ -1674,15 +1674,15 @@ func newTransformFuncZeroArgs(f func(tfa *transformFuncArg) float64) transformFu
 }
 
 func transformStep(tfa *transformFuncArg) float64 {
-	return float64(tfa.ec.Step) * 1e-3
+	return float64(tfa.ec.Step) / 1e3
 }
 
 func transformStart(tfa *transformFuncArg) float64 {
-	return float64(tfa.ec.Start) * 1e-3
+	return float64(tfa.ec.Start) / 1e3
 }
 
 func transformEnd(tfa *transformFuncArg) float64 {
-	return float64(tfa.ec.End) * 1e-3
+	return float64(tfa.ec.End) / 1e3
 }
 
 // copyTimeseriesMetricNames returns a copy of tss with real copy of MetricNames,