Category systolic blood pressure (mmHg) diastolic blood pressure (mmHg) over blood pressure < 120 < 80 normal blood pressure < 130 < 85 high-normal level of 130 to 13 985 ~ 891 high blood pressure ( mild ) stage 140 to 159 90 to 992 hypertension ( moderate ) level 160 to 179 100 to 1093 hypertension ( severe ) ≥180 ≥110 isolated systolic hypertension ≥140 <90